Aeronautical and Space Sciences Japan
Online ISSN : 2424-1369
Print ISSN : 0021-4663
ISSN-L : 0021-4663
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Volume 19, Issue 208
Displaying 1-6 of 6 articles from this issue
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  • On the Eulerian and Lagrangian Properties of Turbulence
    Yasuo IDE
    1971 Volume 19 Issue 208 Pages 173-180
    Published: 1971
    Released on J-STAGE: May 25, 2009
    DOIhttps://doi.org/10.2322/jjsass1969.19.173
    JOURNAL FREE ACCESS
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    The statistical relation between Eulerian and Lagrangian systems of turbulence (β-approach) is derived to improve HAY and PASQUILL'S approximation from the equality of energies of turbulence in both systems.
    INOUE'S turbulon theory of turbulence is also applied to derive the equation for LagrangianEulerian time-scale ratio, or so-called HAY-PAS-QUILL scale parameter β, which is shown to be evaluated only from Eulerian statistics.
    Theoretical discussion shows that Lagrangian correlation function and spectrum can be estimated from Eulerian properties, and that β is the function of Lagrangian time and dependents on intensity of turbulence as well as turbulence scale and approaches the ultimate time-scale ratio βe at very large values of time.
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  • Experimental Study on a Pilot Ballistic Range
    Goro KAMIMOTO, Akimasa TSUKAMOTO, Kaoru OTSUJI
    1971 Volume 19 Issue 208 Pages 180-187
    Published: 1971
    Released on J-STAGE: May 25, 2009
    DOIhttps://doi.org/10.2322/jjsass1969.19.180
    JOURNAL FREE ACCESS
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    Experimental Results on a Pilot Ballistic Range are reported. The ballistic range is designed by the theory of two-stage light gas gun. The experiments were performed under the matching condition of a heavy piston and a model, which is launched with constant acceleration, using Helium gas as driver gas. The obtained velocity of the model (0.3gr weight) is about 3km/sec.
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  • On a High Temperature Chemical Reaction with an Electric Arc Heater
    Hirotsugu KOMURA, Toshimitsu MURASAKI
    1971 Volume 19 Issue 208 Pages 187-193
    Published: 1971
    Released on J-STAGE: May 25, 2009
    DOIhttps://doi.org/10.2322/jjsass1969.19.187
    JOURNAL FREE ACCESS
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    An electric arc heater, of the arc voltage 250V and the arc current 50A, was specially designed and built for the study of a steady arc performance and efficient productions of acetylene through the methane pyrolysis.
    Hot gaseous reection products were quenched and sampled with a water-cooled probe. Under the conditions of the mass flow rate of methane 30liter/min and the electric input power 10-15 kW, major products in the quenched gas were acetylene and hydrogen. The concentration of the acetylene in the quenched samples reached as much as 23-35mol% on favorable conditions. This experimental results were found better consistent with the estimations calculated on the hypothesis of a chain reaction as to the methane pyrolysis, than the analysis based on the assumptions of equilibrium processes.
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  • Automatic Landing (4)
    M. SANUKI
    1971 Volume 19 Issue 208 Pages 194-197
    Published: 1971
    Released on J-STAGE: May 25, 2009
    DOIhttps://doi.org/10.2322/jjsass1969.19.194
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  • Spark Plugs and Aircraft Engines
    Masanori MIYATA
    1971 Volume 19 Issue 208 Pages 198-209
    Published: 1971
    Released on J-STAGE: May 25, 2009
    DOIhttps://doi.org/10.2322/jjsass1969.19.198
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  • Data Sheet
    1971 Volume 19 Issue 208 Pages 211-218
    Published: 1971
    Released on J-STAGE: May 25, 2009
    DOIhttps://doi.org/10.2322/jjsass1969.19.211
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