It is shown that the "damping" effect mainly exists in the zone of 0.5d from the impingement wall, and there are positive as well as adverse pressure gradient in the radial direction.

表明壁面的“阻尼”影响主要集中在近壁面0 . 5D以内，在径向上流动既有顺压梯度，又有逆压梯度。

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It is shown that the "damping" effect mainly exists in the zone of 0.5d from the impingement wall, and there are positive as well as adverse pressure gradient in the radial direction.

表明壁面的“阻尼”影响主要集中在近壁面0 . 5D以内，在径向上流动既有顺压梯度，又有逆压梯度。

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