Numerical Study on Enhancing Heat Transfer of the Belt-type Resistance Heater in the Hypersonic Wind Tunnel

Abstract

Numerical studies of Heat transfer enhancement of belt-type Electric-resistance Heater is reported in this paper. The effect of different kinds of belt arrangements is studied in detail. Results show that, for changing m and n, which is the spacing between adjacent belts both in vertical and horizon, the comprehensive Performance Evaluation Criterion(PEC) increases as belt spacing decreases; For the case of model adding several baffles, the PEC reaches 1.6, with Nu/Nuo and f / f0 comes to 3.38 and 9.51; For the staggered arrangement belt geometry, the PEC attains 1.18 and the flow field uniformity improves significantly compared with the aligned arrangement one.