Cascade heat transfer experiment validation in short duration transonic wind tunnel

Surface heat and mass transfer measurement of MarkII blade was conducted in short-duration wind tunnel with engine representative Reynolds and Mach numbers. The impulse response method based on one dimensional semi-infinite hypothesis was used to treat the measured surface temperature as surface heat transfer rate, and the adiabatic surface temperature and surface heat transfer coefficient were then acquired by least square solution. The heat transfer results are consistent with the steady-state experimental results of public documentation. In addition, the detailed error of the data processing method was analyzed, and two-dimensional transient thermal analysis was compared with the impulse response method. It is found that at the leading edge with larger curvature, trailing edge with thinner thickness and the locations of sharply changed heat transfer coefficient, the one-dimensional and semi-infinite hypothesis is destroyed and the impulse response method leads to a result with larger error.