Pressure and heat transfer measurements for blade surface in short-duration wind tunnel

Surface pressure and heat transfer measurements for an enlarged blade were conducted in a short-duration cold heat transfer wind tunnel at representative Reynolds numbers and pressure ratios. The results suggest that the blade pressure ratio is the main factor affecting the pressure coefficient distribution, while the effect of the Reynolds number can be neglected. The Reynolds number and pressure ratio both contribute to the heat transfer coefficient and local adiabatic wall temperature. With the increase in Reynolds numbers, the surface heat transfer coefficients increase and the transition point of the suction side moves upward, showing that the heat transfer coefficients distribution at larger Reynolds numbers is different from that at smaller Reynolds numbers. The local adiabatic wall temperature decreases with an increase in the pressure ratio or the decrease in the Reynolds number at constant main stream total temperature. Additionally, the experiment data for the local adiabatic wall temperature are smaller than the analytical solution for flat plates at small Reynolds numbers.