The vortex flow field is calculated with difference methods, and the motion characteristics and the bursting mechanism of the leading-edge separated vortices of delta wing are analyzed.
采用差分方法计算旋涡流场，进而分析三角翼上前缘分离涡的运动特点及其破碎机理。
Velocity gradient, pressure gradient and circulation gradient are used to model the separated vortex flow field over a leading edge delta wing.
用速度梯度、压力梯度和环量梯度模拟大攻角尖前缘三角翼流场。
The conception of the apex city of delta belongs to the field of economic geography, which is put forward based on the city location and the natural environment evolution of delta.
三角洲顶点城市是基于城市区位和三角洲自然环境演变特征而提出的经济地理概念，此类城市的存在具有一定的广泛性。
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