实验流体力学
實驗流體力學
실험류체역학
JOURNAL OF EXPERIMENTS IN FLUID MECHANICS
2015年
2期
84-89
,共6页
电弧风洞%超声速导管%热流%塞式量热计%缝隙
電弧風洞%超聲速導管%熱流%塞式量熱計%縫隙
전호풍동%초성속도관%열류%새식량열계%봉극
arc heated wind tunnel%supersonic conduit%heat flux%slug calorimeters%gap
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。
對電弧風洞中超聲速湍流導管內塞式量熱計進行改進，採用測熱耑與校測件線接觸的量熱計和測熱塞塊邊緣與校測件有0．4mm 縫隙的量熱計。與傳統的塞式量熱計熱流測量值進行對比，實驗結果錶明，在低壓、低冷壁熱流條件下3箇量熱計輸齣特性較接近；而隨著壓力、冷壁熱流的增加，線接觸量熱計測量值略有降低，而測熱耑與校測件有縫隙的量熱計測量值大幅增加。最後，通過數值研究瞭縫隙內的流動對熱流測量的影響，同時，模擬瞭其它來流條件不變時來流馬赫數對縫隙內流動的影響。
대전호풍동중초성속단류도관내새식량열계진행개진，채용측열단여교측건선접촉적량열계화측열새괴변연여교측건유0．4mm 봉극적량열계。여전통적새식량열계열류측량치진행대비，실험결과표명，재저압、저랭벽열류조건하3개량열계수출특성교접근；이수착압력、랭벽열류적증가，선접촉량열계측량치략유강저，이측열단여교측건유봉극적량열계측량치대폭증가。최후，통과수치연구료봉극내적류동대열류측량적영향，동시，모의료기타래류조건불변시래류마혁수대봉극내류동적영향。
The slug calorimeters in the supersonic turbulent conduit of the arc heated wind tunnel were improved.The line-contact calorimeter and the calorimeter which has a 0.4mm gap betwenn the heated end brim of the slug and the test article are adopted.Comparing to measured heat flux data by the typical slug calorimeters,the experimental results show that the output characteristics of the three types of calorimeters have good consistency under the condition of low pressure and low cold-wall heat flux;as pressure increases,the measurement values of the line-contact calorimenters slightly decrease and the measurement values of the 0.4mm gap calorime-ters increase noticeably.To explain the result,the flow characteristics of the 0.4mm gap clorim-enters are investigated.The influence of the free stream Mach number on the flow in the gap is also studied.
