首页|A thermoacoustic heat pump driven by acoustic waves in a hypersonic boundary layer
A thermoacoustic heat pump driven by acoustic waves in a hypersonic boundary layer
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NSTL
Acoustic waves existing in hypersonic boundary layers act as a heat pump that transfers energy from the sonic line to the wall causing the wall temperature to rise, which explains the newly identified aerodynamic heating related to Mack's second mode from the perspective of thermoacoustic effects. The analysis of data from direct numerical simulations shows that Mack's second mode, belonging to the family of trapped acoustic waves, is highly amplified in a Mach 6 boundary layer and becomes sufficiently strong to affect the mean wall-normal temperature gradient, and the energy transport in the wall-normal direction due to the thermoacoustic effect balancing the thermal conduction brought by the additional temperature gradient.
hypersoniclayerspump
Jiaming Yu、Yiding Zhu、Dingwei Gu、Cunbiao Lee
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State Key Laboratory of Turbulence and Complex Systems, Peking University, Beijing 100871, China
NSTL
