Fluctuation of heat transfer in shock wave/turbulent boundary-layer interaction

A new method for the measurement of heat-transfer rate with high spatial resolution and fast response is applied to the measurements of the fluctuating heat fluxes in the interaction regions of oblique incident shock waves and turbulent boundary layers. Experiments are performed under these testing conditions of Mach number of 4, wall temperature condition T_W/T₀ of 0.56, and Reynolds number of 1.26 × 10⁷. Measurements are made for both unseparated and separated boundary-layer conditions. For the case of an unseparated boundary layer, fluctuations of heat flux become strong near the impingement point of the incident shock wave, and no intermittency phenomenon is observed. For the case of a separated boundary layer, significant fluctuations of heat flux are observed throughout the interaction region. These fluctuations are very strong, especially near the separation and reattachment points. Near the separation point, intermittency of heat transfer is observed.