unsteadyadj.不稳定的；易变的；颤动的；不规则的；不一致的v.不稳定；动摇unsteady cavity flow非定常空腔流unsteady interaction非定常相互作用unsteady aerodynamic非定常气动力unsteady calculation非定常计算unsteady free stream非定常自由来流unsteady equilibrium非稳定均衡unsteady performance非定常性能unsteady wind tunnel非定常风洞unsteady porous flow不稳定渗流unsteady vortex flow非定常旋涡流动