Development of a Diaphragmless shock Tunnel Using a Butterfly Valve

A diaphragmless shock tunnel is developed using a butterfly valve, which has generally lower energy loss than that of a piston valve. The valve and its driving unit can be made from commercially available parts. Incident shock Mach numbers and stagnation pressures at the barrel end were measured and...

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Bibliographic Details
Published inNihon Kikai Gakkai rombunshuu. B hen Vol. 63; no. 607; pp. 932 - 937
Main Authors KIMURA, Takeyoshi, OGAWA, Kazuhiko, ITOH, Hajime
Format Journal Article
LanguageJapanese
Published The Japan Society of Mechanical Engineers 01.01.1997
Subjects
Compressible flow
Energy dissipation
Hypersonic flow
Performance Test
Pressure measurement
Shock waves
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Summary:A diaphragmless shock tunnel is developed using a butterfly valve, which has generally lower energy loss than that of a piston valve. The valve and its driving unit can be made from commercially available parts. Incident shock Mach numbers and stagnation pressures at the barrel end were measured and compared with those obtained when an aluminum diaphragm was used. The faster the velocity of opening of the valve (or the diaphragm), the larger the incident shock Mach number and the stagnation pressure. Moreover, uniformity of hypersonic flow in the test section was ensured by Mach number distribution based on Pitot pressure measurement. Those results show the feasibility of the valve mechanism.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0387-5016
1884-8346
DOI:10.1299/kikaib.63.932