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Hiroshi MIYASHIRO
1985 Volume 51 Issue 472 Pages
3831-3836
Published: December 25, 1985
Released on J-STAGE: March 28, 2008
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Shinichi KAMIYAMA, Takasuke YAMASAKI
1985 Volume 51 Issue 472 Pages
3837-3843
Published: December 25, 1985
Released on J-STAGE: March 28, 2008
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Yoichiro MATSUMOTO, Toshiaki OKUDAIRA, Masayoshi WADA, Hisao ENOMOTO, ...
1985 Volume 51 Issue 472 Pages
3844-3851
Published: December 25, 1985
Released on J-STAGE: March 28, 2008
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Seiji SHIMIZU
1985 Volume 51 Issue 472 Pages
3852-3859
Published: December 25, 1985
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Yasutoshi SENOO, Hiroshi HAYAMI, Yoshifumi KINOSHITA, Nobumasa KAWAGUC ...
1985 Volume 51 Issue 472 Pages
3860-3866
Published: December 25, 1985
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Munekazu OHMI, Manabu IGUCHI, Fujio AKAO
1985 Volume 51 Issue 472 Pages
3867-3876
Published: December 25, 1985
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Atsuchi OKAJIMA, Kenichiro SUGITANI, Taketo MIZOTA
1985 Volume 51 Issue 472 Pages
3877-3886
Published: December 25, 1985
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Kyozo AYUKAWA, Norikazu KAWASAKI, Mitsuru OHKURA, Ryo ASANO
1985 Volume 51 Issue 472 Pages
3887-3895
Published: December 25, 1985
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Koji KIKUYAMA, Mitsukiyo MURAKAMI, Kenichi GOMI
1985 Volume 51 Issue 472 Pages
3896-3901
Published: December 25, 1985
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Motoyuki ITOH, Atsushi MURATA
1985 Volume 51 Issue 472 Pages
3902-3910
Published: December 25, 1985
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Koichi TSUZUKI, Masahiro IKEGAWA, Masaru NAKAZAWA
1985 Volume 51 Issue 472 Pages
3911-3918
Published: December 25, 1985
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Hisayuki ENNOJI, Tsuyoshi ASANUMA
1985 Volume 51 Issue 472 Pages
3919-3927
Published: December 25, 1985
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Masahiro YAMABE, Shoji ITO, Tsutomu OKUSAWA, Yusuke TAKAGI
1985 Volume 51 Issue 472 Pages
3928-3936
Published: December 25, 1985
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Michiteru YAMAGUCHI, Yasutoshi SENOO, Masayuki NODA
1985 Volume 51 Issue 472 Pages
3937-3944
Published: December 25, 1985
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Hiromi KANEKO, Toshiki IINO, Michiyuki TAKAGI, Kazuhiro KOMATSU
1985 Volume 51 Issue 472 Pages
3945-3953
Published: December 25, 1985
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Mitsuru FUJIWARA, Katsuhiko KASUYA, Tetsuzo MATSUNAGA, Makoto WATANABE
1985 Volume 51 Issue 472 Pages
3954-3961
Published: December 25, 1985
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Tadashi YANAGISAWA, Takashi SHIMIZU, Tatsuya HORIOKA
1985 Volume 51 Issue 472 Pages
3962-3969
Published: December 25, 1985
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Akihiro OOKITA, Shigeki MASUDA, Ichiro ARIGA
1985 Volume 51 Issue 472 Pages
3970-3979
Published: December 25, 1985
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Naohiro IBOSHI
1985 Volume 51 Issue 472 Pages
3980-3988
Published: December 25, 1985
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Kohshi MITACHI, Katsuyuki AOKI, Kenzo KITAMURA, Noritoshi KOMATSU
1985 Volume 51 Issue 472 Pages
3989-3995
Published: December 25, 1985
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Kohshi MITACHI, Katsuyuki AOKI, Kenzo KITAMURA, Masami FURUUCHI
1985 Volume 51 Issue 472 Pages
3996-4003
Published: December 25, 1985
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Hiroshi YAMASHITA, Genichiro KUSHIDA, Ryotaro IZUMI
1985 Volume 51 Issue 472 Pages
4004-4012
Published: December 25, 1985
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Kohshi MITACHI, Hisanori TACHIBANA, Kazuo FURUKAWA
1985 Volume 51 Issue 472 Pages
4013-4020
Published: December 25, 1985
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Etsuro NAITO
1985 Volume 51 Issue 472 Pages
4021-4029
Published: December 25, 1985
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Yujiro HAYASHI, Akira TAKIMOTO, Yoshihide NISHIDA
1985 Volume 51 Issue 472 Pages
4030-4038
Published: December 25, 1985
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Akira TAKIMOTO, Yujiro HAYASHI, Seiji KAWAHARA
1985 Volume 51 Issue 472 Pages
4039-4046
Published: December 25, 1985
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Eiji HASEGAWA, Fumio NAGASHIMA, Toshiro WASHIZAKI
1985 Volume 51 Issue 472 Pages
4047-4054
Published: December 25, 1985
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Tsutomu HOSOKAWA, Tsutomu KAWAI, Akihiko FUJIO, Genichi KOMATSU
1985 Volume 51 Issue 472 Pages
4055-4062
Published: December 25, 1985
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Kazuo SAITO, Toshihiko SAITO, Moriyoshi SAKAMOTO
1985 Volume 51 Issue 472 Pages
4063-4070
Published: December 25, 1985
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Yukio MIZUTANI, Kazuhisa MORIGAMI, Miyoshi TAKAHASHI
1985 Volume 51 Issue 472 Pages
4071-4077
Published: December 25, 1985
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Shuji YAMAGUCHI, Satoshi OKAJIMA, Kazuo IINUMA
1985 Volume 51 Issue 472 Pages
4078-4085
Published: December 25, 1985
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Shoichi FURUHAMA, Masaru HIRUMA, Yoshiteru ENOMOTO
1985 Volume 51 Issue 472 Pages
4086-4094
Published: December 25, 1985
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Kenji MATSUURA, Kazuo TERASAKI
1985 Volume 51 Issue 472 Pages
4095-4101
Published: December 25, 1985
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Gen'ichi KOMATSU, Susumu SHIRAE, Tsutomu HOSOKAWA
1985 Volume 51 Issue 472 Pages
4102-4108
Published: December 25, 1985
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Yutaro WAKURI, Shinsuke ONO, Koji TAKASAKI, Atsuo FUJII
1985 Volume 51 Issue 472 Pages
4109-4116
Published: December 25, 1985
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Yoji SASAKI, Naohisa TESHIROGI
1985 Volume 51 Issue 472 Pages
4117-4123
Published: December 25, 1985
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Tetsuo NISHIYAMA, Kenichi FUNAZAKI
1985 Volume 51 Issue 472 Pages
4124-4131
Published: December 25, 1985
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Forced oscillation response of turbine rotor cascade to upstream viscous wakes, which are regarded as inviscid sinusoidal gust in the analysis, are studied. Taking the effects of the rotor steady loading on unsteady rotational flow around the non-oscillating cascade and irrotational flow around the oscillating cascade into account, vortex distributions over the rotor contours are determined by solving integral equations of Fredholm's type of second kind which are derived from the tangential flow conditions on non-oscillating and oscillating cascade respectively, and then the exciting forces by gust and damping forces by cascade oscillation are obtained. The general characteristics of forced oscillation responses are clarified from equations of motion for bending-torsion coupled oscillation and, in particular, some notable features of frequency and amplitude in resonance are considered through numerical examples.
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Tong ZHAO, Ato KITAGAWA, Toshiharu KAGAWA, Toshio TAKENAKA
1985 Volume 51 Issue 472 Pages
4132-4138
Published: December 25, 1985
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For fluid control and measurement in an unsteady pipe flow, it is useful to estimate one variable precisely from others which can be obtained briefly. This is done using the transformation calculus. In the case of laminar and axially symmetrical flow, transfer functions which relate pressure gradient, mean flow velocity and local velocity at a specified point on the same cross section of pipe contain the Bessel function. In this paper, good approximate functions of the transfer functions are obtained in the simple form of linear combination of the proportional element, the first order lag element and the element based on the second order lag element. by the use of approximate transfer functions, an efficient transformation calculus of the variables in unsteady pipe flow can be realized.
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Tong ZHAO
1985 Volume 51 Issue 472 Pages
4139-4145
Published: December 25, 1985
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If the flow is laminar and axially symmetrical, transfer functions which relate variables in unsteady pipe flow can be obtained in the form of functions which contain the Bessel function. The author has presented the approximate functions of the transfer functions in another report. The present report explains the transformation calculus which is the technique for the estimation of one variable from another variable in unsteady pipe flow. By applying the approximate transfer function, the transformation calculus becomes quite efficient. The technique of transformation calculus explained in this paper is expected to be applied to the indirect measurement of the variables in unsteady pipe flow.
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Hiroshi SAKAMOTO, Hiroyuki HANIU
1985 Volume 51 Issue 472 Pages
4146-4154
Published: December 25, 1985
Released on J-STAGE: March 28, 2008
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Time-mean and fluctuating forces acting on two rectangular prisms of the same dimension in tandem arrangement placed vertically in a turbulent boundary layer were investigated experimentally. The results were summarized in several figures from which one can obtain the time-mean drag, the fluctuating drag, the fluctuating lift and the Strouhal number for the various distances between the two prisms. Further, phase relationships between the fluctuating lift and the fluctuating pressure of the two prism were presented and discussed. The vortex shedding from the downstream prism was triggered by the arrival of the vortices from the upstream prism when the distance between the two prisms exceeds 2.5 times of the prism width. The phase shift between the fluctuating lift acting on the two prisms was found to be proportional to the distance between the two prisms.
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Seiichi SUDO, Hiroyuki HASHIMOTO, Junji TANI, Masakatsu CHIBA
1985 Volume 51 Issue 472 Pages
4155-4161
Published: December 25, 1985
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An experimental study is presented for the dynamic behavior of a liquid in an elastic container subject to horizontal oscillation with high frequencies. The harmonic wave motion, the formation of azimuthal waves, flow pattern on the free surface, frequency characteristics of pressure and the surface disintegration are investigated. The effect of the natural frequency of liquid-shell system for the formation of azimuthal waves and the surface disintegration worked to decrease the threshold excitation acceleration for formation of the wave and the disintegration. The several circulation flows were formed on the free surface by the lateral vibration. It was observed that the pressure responses had large values in the vicinity of the natural frequency of the system. Many floating liquid drops on the turbulent free surface were observed after the surface disintegration. It was also found that the response of liquid free surface depended on certain combination of excitation frequency and acceleration.
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Koji KIKUYAMA, Mitsukiyo MURAKAMI, Masayuki OSHIRO, Mitsukane ADACHI, ...
1985 Volume 51 Issue 472 Pages
4162-4169
Published: December 25, 1985
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Distributions of velocity and turbulent intensities in turbulent boundary layers developed in a diffuser were studied experimentally when the diffuser was rotated about an axis perpendicular to it. with an increase in the opening angle of the diffuser, the turbulent intensities and the time mean velocity gradient increased more near the pressure side wall, but decreased further near the suction side wall due to the effects of the Coriolis force. On the pressure side wall, turbulent intensities was enhanced by rotation, and the Monin-Oboukhov formula was ascertained to be approximately established within the experimental range even in a adverse pressure gradient.
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Masatoshi SANO, Naomichi HIRAYAMA
1985 Volume 51 Issue 472 Pages
4170-4176
Published: December 25, 1985
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The structure of the outer intermittent region of non-equilibrium turbulent boundary layers disturbed by injection and suction through a slit is investigated experimentally. conditional sampling and averaging are used to generate mean and fluctuating components for the turbulent and non-turbulent zones of fluid. Further, space-time correlation is measured. The main results are summarized as follows: The center of intermittency moves outward from the wall, and the width of the intermittent zone decreases by the effect of injection. In the case of suction, the reverse characteristics, compared with injection, are observed. There exists a circulatory flow inside the turbulent bulge. This result is consistent with that of an equilibrium turbulent boundary layer. On the basis of the experimental results, a conceptual explanation for the development of the boundary layer and wall shear stress is discussed.
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Yutaka TANAKA
1985 Volume 51 Issue 472 Pages
4177-4182
Published: December 25, 1985
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This paper is subsequent to that dealing with the statistical quantities of turbulences in a pulse jet, and is concerned with experimental analysis of the energy balance in the transient zones of axisymmetric jets, which are exhausted continuously or pulsatedly from a circular nozzle. The magnitude of each term constituting the energy equation for turbulent motion has been calculated, and the results of the steady jet are compared with those of Sami. Temporal and spatial variations of the turbulence scale and energy components are also evaluated. It was found from the energy analysis of the pulse jet that the diffusion and pressure-transport terms which are of a negligible order for the steady jet, become the strong ones of the order compared to the other terms.
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Toshio TANAKA, Eiichi TANAKA, Yoshihiro INOUE
1985 Volume 51 Issue 472 Pages
4183-4187
Published: December 25, 1985
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This paper describes an experimental investigation on the control of a radial turbulent jet flow reattached to an adjacent offset disc plate with an additional control flow. Mean velocity and turbulent velocity distributions were measured with the aid of a hot-wire anemometer, and the effects of step height and control flow rate (ratio of control flow to main jet flow, suction and blowing) on the flow before reattachment point were investigated. The results were compared with those obtained from the pressure distributions. Changes of the maximum jet center velocity, jet half width and turbulence at velocity maxima, and also deflection of jet center axis, depend on the combination of the step height and control flow rate.
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Masaru DANNO, Shoji HAYASHI, Toshiyuki ASAKURA
1985 Volume 51 Issue 472 Pages
4188-4193
Published: December 25, 1985
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This paper is concerned with a study of a liquid flowmeter by applying the principle of the bearingless windmill-type gas flowmeter already developed by the authors. The float equipped with a water mill is floating on the surface of liquid in a bell-type enclosure, and the position of the float is held on the center by a magnetic attraction. Since the liquid is Newtonian, the friction between the float and the liquid is expected to be negligible when the relative speed is near zero. Thus the flowmeter enables a extremely flow flow rate measurement. The rotating speed of the water mill by a liquid flow is detected by means of opto-electronic counting procedures without any friction on the rotation, and from which the flow rate of a liquid is obtained. The flowmeter proposed here shows a linearity over the wide range of the flow rate from 1×10
-7 to 5×10
-5m
3/s.
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Kenkichi OHBA, Tsutomu YUHARA, Hideto MATSUYAMA
1985 Volume 51 Issue 472 Pages
4194-4200
Published: December 25, 1985
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Simultaneous measurement of local velocities of both phase bubbly flow have been successfully made using a laser Doppler velocimeter (LDV). First, an exact theory which forms the basis of the velocity measurement of a large particle, such as a bubble, has been derived and its validity confirmed by experiments. Second, the present measurement method has been applied to an air-water vertical bubbly flow. As a result, it has become evident that the measured value of a local slip velocity between bubble and liquid is lower than a terminal velocity of a single bubble rising in still water, and that the slip velocity gradually decreases with the increase in the mean liquid velocity.
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Hiroshi MAKI, Yuuichi IKEDA
1985 Volume 51 Issue 472 Pages
4201-4207
Published: December 25, 1985
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We have frequently experienced large amplitude vibration of floats of float-area-type flow meters. Nevertheless, elements generating unsteady flow have not been installed through pipelines when employing gases as working fluids. This kind of instability has been considered to be most dangerous when using the float-area-type flow meters. In order to clarify factors influencing this kind of float instability of the float-are-type flow meters, a theoretical study was performed in this paper by adopting a simple model which consisted of a float-area-type flow meter and a circular pipe installed upstream. The theoretical results were verified by experiments of self-excited vibration of the float, which were carried out by varying the length of the circular pipe and air as the working fluid. Good agreement was ascertained between the theoretical and the experimental results.
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Kohzaburo NAKABAYASHI, Yutaka MIYAKE, Tyusei AOI
1985 Volume 51 Issue 472 Pages
4208-4213
Published: December 25, 1985
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In this report, the specification of the boundary conditions on the outer boundary surface is discussed in relation to the problem of the numerical solution of low Reynolds number flow around a three-dimensional body immersed in a uniform stream. All the numerical solutions of a flow around a sphere available in literatures assume uniform flow on the outer boundary. However, the authors' previous work which the dealt with two-dimensional flow suggests that boundary conditions which take into account the effects of wake of the body is indispensable, if small computational domain is employed. The present work extends the discussion to three-dimensional flows. It has been confirmed that a single Oseenlet in the direction of uniform flow is the most useful in the far field.
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Junjiro IWAMOTO
1985 Volume 51 Issue 472 Pages
4214-4217
Published: December 25, 1985
Released on J-STAGE: March 28, 2008
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The unsteady, one-dimensional flow in an H-S tube was calculated using the Random-Choice Method, in which the wall friction and the heat transfer wre taken into account. In particular, the effect of the length of the tube was examined, and the following conclusions were drawn: 1. The amplitude of the pressure oscillation decreases with an increase in the tube length. 2. for a tube of L=10m, the initial penetration length of the contact surface is 60% of the tube length measured from the open end, and after the interference of the contact surface with the shock wave, it becomes stationary without flow oscillation. 3. The maximum penetration length of the contact surface for a tube of L=1m is 37% of the tube length.
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