| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2005: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2004: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Research Abstract |
For the purpose of the development of non-regular pressure measurement technology on supersonic flow, the development of visualization image measurement technology by the application of the digital camera, and for study on the flow phenomenon of unsteady flows, the oscillating phenomenon of shock waves by the application of CFD, the part of research has been done. Especially, in order to solve the study on digital visualization image processing establishment system and the digital images in flow field, the shock wave structure in a supersonic jet flow and the self-excited oscillation were was subjected to be done by the application of CFD. Furthermore, for that make it understood about the relation between generation source of the noise and the self-excited oscillation flow with shock wave, the analyses on the frequency of pressure vibration and digital noise were done through the application of digital visualization image measurement technology, non-regular pressure measurement technology, and a certain amount research was able to be obtained. As a result, the structure of the Coanda effect was clarified by the experiment and its behavior was clarified by the numerical analysis. Moreover numerical analysis of the propagation of shock waves was carried out using several different silencer models with internal structures of comparatively simple numerical analysis.
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