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Tetsuo NISHIYAMA, Nobuo OKITA
1985 Volume 51 Issue 465 Pages
1369-1376
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Hidenobu SHOJI, Hideo OHASHI, Haruo TAHARA
1985 Volume 51 Issue 465 Pages
1377-1383
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Manabu IGUCHI, Munekazu OHMI, Ken-ichi NISHIZAWA
1985 Volume 51 Issue 465 Pages
1384-1392
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Hitoshi MURAI, Shigenao MARUYAMA
1985 Volume 51 Issue 465 Pages
1393-1399
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Susumu ISHII, Hideo TANAKA, Ichiro FUJIMOTO
1985 Volume 51 Issue 465 Pages
1400-1408
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Masahiro INOUE, Abd-ElAziz Farouk, Yoshihisa YAMAMOTO, Nobuo YAMAGUCH ...
1985 Volume 51 Issue 465 Pages
1409-1416
Published: May 25, 1985
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Osami KITO, Eisei KAMIYA
1985 Volume 51 Issue 465 Pages
1417-1425
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Toshio KOBAYASHI, Tohru NAKAYAMA, Tomo-o ISHIHARA
1985 Volume 51 Issue 465 Pages
1426-1435
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Yutaka NISHIMURA, Yoshishige OHYAMA
1985 Volume 51 Issue 465 Pages
1436-1443
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Nobuyasu YOKOI, Masaya IMAI, Katsuaki KIKUCHI, Toshiki IINO, Michiyuki ...
1985 Volume 51 Issue 465 Pages
1444-1450
Published: May 25, 1985
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Koji AKAGAWA, Yoshihiro ASANO
1985 Volume 51 Issue 465 Pages
1451-1458
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Haruo MISHINA, Hideo NISHIDA
1985 Volume 51 Issue 465 Pages
1459-1467
Published: May 25, 1985
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Tohru MAEKAWA, Ichiro TANASAWA
1985 Volume 51 Issue 465 Pages
1468-1474
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Tohru MAEKAWA, Ichiro TANASAWA
1985 Volume 51 Issue 465 Pages
1475-1482
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Haruyuki YAMAZAKI, Seiichiro SAKAGUCHI
1985 Volume 51 Issue 465 Pages
1483-1489
Published: May 25, 1985
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Ryohachi SHIMADA, Koichi TAKAYAMA, Toshiro TAKEYAMA
1985 Volume 51 Issue 465 Pages
1490-1496
Published: May 25, 1985
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Shigeru KOYAMA, Tetsu FUJII
1985 Volume 51 Issue 465 Pages
1497-1506
Published: May 25, 1985
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Shuya KAMEI, Masaru HIRATA
1985 Volume 51 Issue 465 Pages
1507-1513
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Heishichiro TAKAHAMA, Osamu OKADA, Hideomi FUJITA, Terutada KOJIMA
1985 Volume 51 Issue 465 Pages
1514-1521
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Hiroya SHIDA, Takeshi ADACHI, Mutsuo KURAGASAKI, Takeshi KUNIMOTO, Mas ...
1985 Volume 51 Issue 465 Pages
1522-1528
Published: May 25, 1985
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Kazuki KOBAYASHI, Takahide YAMAMOTO, Toshitaka KUROKI, Katsuya NAGATA
1985 Volume 51 Issue 465 Pages
1529-1539
Published: May 25, 1985
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Hideo MIKI, Kiichiro TAKEUCHI, Kozo ISHIDA, Yoshinobu YOSHIHARA
1985 Volume 51 Issue 465 Pages
1540-1548
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Ken OKAZAKI, Hideo SHISHIDO, TAKASHI NISIHKAWA, Kazutomo OHTAKE
1985 Volume 51 Issue 465 Pages
1549-1556
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Norimasa IIDA, Kensuke KOHNO, Yoshio YONEZAWA, Osamu KAWAGUCHI, G.Take ...
1985 Volume 51 Issue 465 Pages
1557-1565
Published: May 25, 1985
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Makoto IKEGAMI, Masahiro SHOJI, Yoshihiro SAKAGAMI
1985 Volume 51 Issue 465 Pages
1566-1573
Published: May 25, 1985
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Kazuhiro MURAI, Masayoshi NAKAGAWA, Takafumi NAKAGAWA, Masao TAGA, Koj ...
1985 Volume 51 Issue 465 Pages
1574-1581
Published: May 25, 1985
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Seiichi SHIGA, Michikata KONO, Kazuo IINUMA
1985 Volume 51 Issue 465 Pages
1582-1590
Published: May 25, 1985
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Seiichi SHIGA, Michikata KONO, Kazuo IINUMA
1985 Volume 51 Issue 465 Pages
1591-1599
Published: May 25, 1985
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Kazunori WAKAI, Shoushi SHIMIZU, Hiroaki FUMA, Toshio HIRATA, Hiroshi ...
1985 Volume 51 Issue 465 Pages
1600-1609
Published: May 25, 1985
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Sadayuki TANAKA, Takeshi KUNITOMO, Toshimi YOSHIDA
1985 Volume 51 Issue 465 Pages
1610-1614
Published: May 25, 1985
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Kyuro SASAKI, Masaru KIYA
1985 Volume 51 Issue 465 Pages
1615-1618
Published: May 25, 1985
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Seiichi TANIGUCHI, Katsumi MIYAKOSHI, Seiji DOHDA
1985 Volume 51 Issue 465 Pages
1619-1623
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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The characteristics of the fluid dynamics of the two-dimensional square cylinder were investigated experimentally in case that the parameters were the blockage ratio and the gapratio s/h, where s means the gap between cylinder and plane wall, h the side length of the cylinder. The time-mean fluid force and fluctuating force the cylinder rapidly increased when the gap ratio was over the critical value (s/h)
cr. This critical value (s/h)
crcr decreased with the increase of the blockage ratio. It was also found in the visualization experiment that the Flow patterns around the cylinder were classified into two patterns on the boundary of this critical value.
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Takakage ARAI, Hiroyuki HASHIMOTO
1985 Volume 51 Issue 465 Pages
1624-1630
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Helical surface instability of a cylindrical liquid jet in a cocurrent uniform gas stream were investigated theoretically and experimentally. The results of the linear instability theory showed that a nonaxisymmetric wave disturbance could grow enough for a large relative velocity between the liquid jet and the gas stream. When the relative velocity became larger than a specified value, the shape of the liquid jet changed from "axisymmetric mode". The helical disturbance on the liquid surface over the downward liquid column and broke up into droplets. For the frequency of the helical disturbance, the theoretical results agreed well with the experimental results. It was also found that the relation of the helical disturbances to the fluid Flow conditions.
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Nobuyuki SHIMA
1985 Volume 51 Issue 465 Pages
1631-1636
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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The Reynolds stress model for high Reynolds numbers by Launder et al, is extended to near-wall regions oFlow Reynolds numbers. In the development of the model, particular attention is given to the high anisotropy of turbulent stresses in the immediate vicinity of a wall and to the behavior of the exact stress equation at a wall. A transport model for the turbulence energy dissipation rate is also developed by taking into account its compatibility with the stress model at a wall.
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Masami SAKAMOTO, Kyoichi FUKUNAGA, Hideo OSAKA
1985 Volume 51 Issue 465 Pages
1637-1641
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Measurements of time-mean properties of the turbulent boundary layer developing on the plane wall with lateral roughness discontinuities has been made. Results are summarized as follows : The spanwise non-uniformity of the boundary layer characteristics was caused due to the discontinuity of wall shear stress in the regions of spanwise transition from rough to smooth wall-condition, and this tendency still remains in the downstream direction. Owing to the evaluation of the energy thickness, a degree of spanwaise non-uniformity increase to the downstream direction, and for the rough wall parts it arises largely.
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Masahide NAKAMURA, Tadashi SAWADA
1985 Volume 51 Issue 465 Pages
1642-1647
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Turbulence transition of Bingham plastic fluid is studied theoretically by evaluating the stability of small disturbances. As the object of this study, fully developed Flow in a pipe is chosen. Then basic equation is derived from the Hencky equation and for the numerical calculation. Runge-Kutta-Gill method is adopted. In case of Bingham plastic fluid, it is found that the calculated Critical Reynolds Number does not become infinity. The calculated Critical Reynolds Number is compared with the experimental results and it is found that the calculated results agree well with the experimental results if relative plug radius is greater than 0.6.
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Tadashi SAKAGUCHI, Mamoru OZAWA, Hachiro HAMAGUCHI, Fumitoshi NISHIWAK ...
1985 Volume 51 Issue 465 Pages
1648-1653
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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An impact force of a transient liquid slug was measured in air-water horizontal two-phase Flow system. The time response of the impact force was characterized by the initial impact force, maximum force, acting period of force and mean effective force which were discussed with reference to the volumetric liquid and gas fluxes and also to the Flow characteristics of the transient slug Flow in horizontal pipes.
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Tadashi SAKAGUCHI, Mamoru OZAWA, Hachiro HAMAGUCHI, Fumitoshi NISHIWAK ...
1985 Volume 51 Issue 465 Pages
1654-1659
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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A Transient liquid slug Flow was analysed on the basis of the scooping model and by applying equations of integral balance of mass and momentum for an arbitrary geometrical volume closed by moving surfaces through which liquid Flowed in and out. The analytical results agreed well with the experimental results of the Flow characteristics and impact force of the transient liquid slug. The dynamic behavior of the impact force was discussed with reference to the analytical results of the dynamic behavior of the Flow.
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Daisuke KONNO, Seiyo MAEKAWA, Asahiro WAKIGAWA
1985 Volume 51 Issue 465 Pages
1660-1665
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Shaft displacement due to pump casing deformation which occurs when external piping forces and moments are applied was investigated. The test pump was an axially split, single-stage double-suction volute type with foot support. An analysis by FEM (MSC/NASTRAN) and actual measurements were performed and considerable agreement was obtained. Ito was found that shaft displacement due to pump casing deformation can not be neglected in the case of pumps with foot support. In API 610-6th standard, limit of shaft displacement is 0.127 mm for pumps which have suction bores 300 mm or larger than 300 mm to enlarge this limitation. Effects of pump size and casing thickness on shaft displacement were investigated by FEM. The possibility of galling of casing wearing ring and considerable leakage from mechanical seal caused by piping loads also were investigated.
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Takashi KUBOTA, Seiji TAKIMOTO, Masami KAWASHIMA
1985 Volume 51 Issue 465 Pages
1666-1671
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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The effects of stay vane angle on the turbine efficiency performance was investigated with a tandem circular cascade comprising stay vanes and wicket gates of a high specific speed Francis turbine. The velocity distributions around the stay various and wicket gates as wall as the variation of angular momentum along the streamline were calculated with the Flow analysis computer program based on the quasi-three dimensional Flow theory for the various combination of the stay vane setting angle and the wicket gate opening. A model Francis turbine having the same configurations of stay vane and wicket gate as those analyzed numerically was tested to measure the turbine efficiency and compare with the results of slow analysis. The measured results showed a good correlation with the calculated results and it made clear that the angle of stay vane affects the turbine efficiency in the region of large wicket gate opening.
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Masahiro TAKEBAYASHI, Hiroshi IWATA, Akio SAKAZUME, Kenjiro YOKOYAMA
1985 Volume 51 Issue 465 Pages
1672-1677
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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This paper concerns the discharge characteristics of the oil feeder pump for a horizontal type compressor. This pump makes use of the reciprocating motion of the vane which in one of the parts of the compressor. Also, this pump replaces the conventional suction/discharge valves by the nozzle type fluidic diodes. The fluidic diode performance can be represented by the ratio of the pressure drop in the reverse Flow direction to that of forward Flow direction at the same Flow rate. We discussed the characteristics of the pump based on this ratio of fluidic diode. The experimental results present the relation between the discharge of the pump and the shape of the nozzle type fluidic diode.
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Takashi WATANABE, Ikuo NAKAMURA
1985 Volume 51 Issue 465 Pages
1678-1683
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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This study investigates the applicability of the symbolic data processing program to the various kinds of problems in fluid mechanics and examines its possibilities. As a link of the chain of this study, we take up the dimensional analysis using the pi theorem and develop the system written in LISP, which helps human intelligence analyze physical phenomena by the pi theorem. Some features of this system are as follows : The dimensions of the physical quantities have been put in the storage of the system in advance. When a physical quantity is input, the system gets into dimensions from the storage. This saves the difficulty of the input. The existing quantities, such as the Reynolds number and the Nusselt number have also been placed in the storage. When the pi numbers obtained by the pi theorem need the rewriting or when the physical meaning of the pi numbers is required the system refers to the existing quantities in the storage and imparts instruction.
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Masaru ISHIZUKA, Yoshiro MIYAZAKI, Tomiya SASAKI
1985 Volume 51 Issue 465 Pages
1684-1687
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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This paper presents a simple formula for thermal designing of natural-air-cooled electronic equipment casings with standard arrangement for circuit boards and power supplies. The formula meets the requirements as a practical formula, since it represents the air-cooling system in its simplified form with due regard to such factors as the stack effects, air Flow resistance, natural convective transfer and so on. The formula was applied to predict temperature rise for two practically used electronic equipment cabinets with standard arrangements and a modeling case. The predicted temperature rise values, obtained through the formula, caused very slight errors, with only 10 percent in the actual values based upon experiment results.
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Tomoaki KUNUGI, Hideo KABURAKI, Takakazu TAKIZUKA
1985 Volume 51 Issue 465 Pages
1688-1693
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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In a HTGR, the reactor core is operated with reference to a core region outlet temperature of coolant gas. The coolant gas. The coolant temperature is measured by a thermocouple installed within a cavity of a plenum block. Therefore, an accurate measurement of the coolant temperature is required. This paper presents an experimental study on two-jet mixing in the cavity of the plenum block. The temperature distribution in the cavity were measured for various Flow conditions and cavity configurations. Preferable configurations for thermal mixing were obtained.
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Minoru OSUGA, Yoshishige OYAMA
1985 Volume 51 Issue 465 Pages
1694-1698
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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To measure air excess ratio in exhaust gas, sensors which measure oxgen density in the gas by solid oxide electrolyte with gas diffusion layer are used. In this paper, the movement of oxygen in the gas diffusion layer by solid oxide electrolyte is simulated by Nelnst's equation oxide electrolyte and diffusion equation for gas diffusion layer. As a result, authors confirmed that the current value at the solid oxide electrolyte with the change of oxgen density distribution in gas diffusion layer is consistent with the experimental value, and is effected by the thickness of the diffusion layer.
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WANG Wei-Cheng, Tetsu FUJII
1985 Volume 51 Issue 465 Pages
1699-1702
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Numerical solutions are presented for combined shear and gravity-controlled condensation on a horizontal tube, around which a fine wire is coiled, by using a simplified physical model. The local Nusselt number distribution represents that the effect of surface tension upon heat transfer decreases with the increase of vapour velocity. The avarage Nusselt number can be expressed by a rule of forth-power combination of the equations for shear-condensation and gravity-controlled condensation. The heat transfer enhancement ratio against a smooth tube decreases with the increase of vapor velocity, because the decrease of effective heat transfer surface becomes more significant than the heat transfer enhancement due to surface tension. The Nu-equation for gravity-controlled condensation can be applicable in the velocity range where the heat transfer enhancement is achieved.
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G.Takeshi SATO, Toshio SUZUKI, Naochika TOKUOKA
1985 Volume 51 Issue 465 Pages
1703-1711
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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Experiment have been carried out on the behavior of the water drop impinging upon a hot surface. The effects provided by the drop diameter, the velocity and the surface temperature on the variations of disintegration patterns and deformation have been studied and experimented quantitatively. Drops were produced by the dripping method and by the impulse jet nozzle which was developed newly and consisted of a cylindrical piezoelectric ceramics. According to the results, the critical Weber number of the disintegration pattern keeps a constant at the hot surface temperature of more than 300°C but this decreases approaching the Leidenfrost point and the deformation of the small drop, of one less than approximately 300μm in diameter, is smaller than that of the larger one. Furthermore, the maximum spreading time to the contacting time t
dsmax/τ shows constant, even if the diameter and/or the velocity change, and its value is approximately 0.25-0.3.
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Naochika TOKUOKA, Toshio SUZUKI, G.Takeshi SATO
1985 Volume 51 Issue 465 Pages
1712-1719
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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The behavior of the drop impinging upon a hot surface has been investigated experimentally in this paper. Putting importance on the dynamic aspects, the effects provided by the drop's viscosity and the surface tension on the variation of disintegration and deformation of the drops have been examined. The conclusions are summarized as follows; For drops with kinetic viscosity of upto approximately 60 mm
2/s, the disintegration patterns can be identified by We number, even if the surface tension and/or the impinging velocity differ. Also, the non-dimensional maximum spreading diameter d
smax/d
i and the non-dimensional maximum apparent contact diameter d
cmax/d
i and the non-dimensional maximum apparent contact diameter d
cmax/d
i can be categorized soley under the We number. But the viscosity increases and becomes more than approximately 80 mm
2/s, the effect of viscosity on the variation in disintegration patterns and deformation becomes more marked and then cannot be identified solely by We number. In this study, the experimental equations for d
smax/d
i have been defined by We number and viscosity.
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Yoshinori OHTSUKA, Tsugio YOSHIKAWA, Osamu SUGIMOTO
1985 Volume 51 Issue 465 Pages
1720-1724
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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This paper proposes a novel rotating heat pipe which utilizes convective heat transfer instead of boiling and condensation heat transfer, and the Archimedean Screw for water recirculation. The heat pipe consists of the double whose concentric annulus has the screws. The heat transfer experiments were conducted using conducted using four types of pipes of 28 and 37 mm ID, 480 mm long with the screw pitch of 10 and 25 mm for 28 mm ID pipes, and 25 and 75 mm for 37 mm ID pipes. The working liquid was tap water and the volumetric charge was 50-75% of pipe volume. The heat apparent heat transfer coefficient was about 1 100-2 250 w/(m
2·C). This was 37-75% of the rotating heat pipe which has about 3 000w/(m
2·°C) of heat transfer coefficient.
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Takao KARASAWA, Seiichi SHIGA, Toshio KURABAYASHI
1985 Volume 51 Issue 465 Pages
1725-1730
Published: May 25, 1985
Released on J-STAGE: March 28, 2008
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This paper presents the experimental study on the phenomena of evaporation and ignition of the fuel-droplet impinged upon a hot surface. The experiment was made on the seven kinds of fuel. It was revealed that cool flame is generated in η-Heptane and diethyl-Ether at a surface temperature range which is 300-400 K below that of hot flame generation. The surface temperatures at which the cool and hot flames were generated were measured by applying a statistic method. Their delay times were also measured and then divided into physical and chemical delays by applying the statistic technique which was presented by S.Kumagai et al. Based upon these investigations, the natures of both the cool and hot flames were clarified and the difference between the surface temperature of hot flame generation and the ignition temperatures measured by using the crucible method was discussed.
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