head field gradient 中文意思是什麼
head field gradient
解釋
磁頭磁場梯度-
The 3d turbulent flow fields around high - speed trains of four kinds of model uain have been calculated by 3d parallel compute program coded with the algorithms presented in this thesis. from the calculation results, the aerodynamic drag of different types of model trains are obtained, some characteristics of the flow field over the high - speed train are analyzed preliminarily such as pressure distribution and diversification, velocity distribution and diversification, and the affections of different train head shape to pressure. velocity, pressure gradient and the like
用三維并行計算程序模擬了四種不同高速列車車型的外流場,獲得了不同車型的運行阻力;詳細分析了列車附近流場的壓力分佈及其變化情況,討論了列車頭型對列車通過時產生的壓力波動的影響;分析了四種車型外部流場的速度分佈規律及其變化情況,分析了列車頭部形狀對它們的影響。
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