Study on passive control around throat in a transonic diffuser

Yagat, Minoru; Haga, Tsuyoshi; Oyakawatt, Kenyu

doi:10.2514/6.2000-902

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Behavior Of the Starting Shock Wave1

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2006

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“…It is found that the shock waves move downstream with the pressure ratio and that they are relatively scattered even at the same pressure ratio. The porous cavity does not seem to attenuate the fluctuation of the shock wave, in which the pressure fluctuations are believed to be decreased according to our previous report about the passive control in a transonic diffuser [10]. Now we nominally divide the three patterns of the distribution of the shock waves.…”

Section: Behavior Of the Starting Shock Wavementioning

confidence: 73%

Study of interaction between supersonic flow and rods surrounded by porous cavity

et al. 2006

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In this paper, some preliminary calculations and the experiments were performed to figure out the flow field, in which some rods were normally inserted into the main flow surrounded by a porous cavity. As a result, it is found that the starting shock wave severely interacts with the rods, the bow shock wave, its reflections, and the porous wall, which are numerically well predicted at some conditions. Moreover, inserting the rods makes the pressure on the upper wall in the porous region increase when the main flow in the porous region is completely supersonic.The calculations also suggest that three rods cause the widest suction area.

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Section: Behavior Of the Starting Shock Wavementioning

confidence: 73%