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对电弧风洞中超声速湍流导管内塞式量热计进行改进,采用测热端与校测件线接触的量热计和测热塞块边缘与校测件有0.4mm缝隙的量热计。与传统的塞式量热计热流测量值进行对比,实验结果表明,在低压、低冷壁热流条件下3个量热计输出特性较接近;而随着压力、冷壁热流的增加,线接触量热计测量值略有降低,而测热端与校测件有缝隙的量热计测量值大幅增加。最后,通过数值研究了缝隙内的流动对热流测量的影响,同时,模拟了其它来流条件不变时来流马赫数对缝隙内流动的影响。
The supersonic turbulent duct internal plugging calorimeter in arc tunnel is improved. The calorimeter with the hottest end and the measuring line are in contact with each other. The results show that the output characteristics of the three calorimeters are close to those of low-pressure and low-wall heat flow. With the increase of pressure and cold wall heat flow, the line contact The measured value of the calorimeter is slightly lower, while the measured value of the calorimeter with the gap between the heat-measuring end and the test piece is greatly increased. Finally, the influence of the flow in the gap on the measurement of heat flow is numerically studied. At the same time, the influence of the flow Mach number on the flow in the gap is simulated.