结果表明，外流造成的性能损失主要体现在运载器底部阻力增加和塞锥表面压强降低两方面。
It is shown that aerospike nozzle performance losses caused by free stream primarily result from increase of lift body base drag and decrease of plug pressure distribution.
研制了由内向外流动的螺旋通道微流控PCR玻璃芯片，减少了PCR反应液在微通道中流动时的分散和阻力；
A spiral-channel flow-through PCR microchip reactor with 35 cycles, which reduced the dispersion and flow resistance of reaction solution, has been developed.
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