工程热物理学报
工程熱物理學報
공정열물이학보
JOURNAL OF ENGINEERING THERMOPHYSICS
2009年
11期
1946-1948
,共3页
偶极子磁场%高超声速%脱体距离%化学非平衡%电导率
偶極子磁場%高超聲速%脫體距離%化學非平衡%電導率
우겁자자장%고초성속%탈체거리%화학비평형%전도솔
dipole magnetic field%hypersonic%shock standoff distance%chemical nonequilibrium%electrical conductivity
对偶极子磁场作用下的三维钝头体高超声速黏性绕流的化学非平衡流动进行了数值模拟.计算结果表明,在偶极子磁场强度为1.353 T时,与无磁场作用时相比,激波的脱体距离增加,增幅约为50%;壁面压力系数下降,局部下降最大达37%;壁面摩擦系数减小,局部最大可减小20%.同时,计算结果与磁场作用下的冻结流进行了比较,结果显示化学非平衡流中激波脱体距离比冻结流中小50%,滞止点温度低一半.
對偶極子磁場作用下的三維鈍頭體高超聲速黏性繞流的化學非平衡流動進行瞭數值模擬.計算結果錶明,在偶極子磁場彊度為1.353 T時,與無磁場作用時相比,激波的脫體距離增加,增幅約為50%;壁麵壓力繫數下降,跼部下降最大達37%;壁麵摩抆繫數減小,跼部最大可減小20%.同時,計算結果與磁場作用下的凍結流進行瞭比較,結果顯示化學非平衡流中激波脫體距離比凍結流中小50%,滯止點溫度低一半.
대우겁자자장작용하적삼유둔두체고초성속점성요류적화학비평형류동진행료수치모의.계산결과표명,재우겁자자장강도위1.353 T시,여무자장작용시상비,격파적탈체거리증가,증폭약위50%;벽면압력계수하강,국부하강최대체37%;벽면마찰계수감소,국부최대가감소20%.동시,계산결과여자장작용하적동결류진행료비교,결과현시화학비평형류중격파탈체거리비동결류중소50%,체지점온도저일반.
Three-dimensional hypersonic viscous chemical nonequilibrium flows around a blunt body are numerically investigated in a dipole magnetic field.The results show that the shock standoff distance increases by about 50%,local wall pressure coefficient and local skin friction coefficient decrease by about 37%and 20%,respectively in a dipole magnetic field B_0=1.353 T.Comparison of .those results with that of frozen flow under the magnetic field shows that both the shock standoff distances and temperatures at a stagnation point in chemical nonequilibrium flow decrease by about 50%.
