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对圆形轴对称射流冲击下的轴向、径向压力梯度值进行了理论计算．就引射、局部换热系数径向分布峰值出现的位置及机理进行了分析、讨论．计算结果与浸没射流的实验结果符合较好，压力梯度的存在决定了浸没射流的径向换热分布形状，而Ｒｅ数只是控制其换热的强弱
The axial and radial pressure gradients under the impact of circular axisymmetric jet were calculated theoretically. The location and mechanism of the peak of radial distribution of induced and local heat transfer coefficient were analyzed and discussed. The calculated results are in good agreement with the experimental results of submerged jets. The existence of pressure gradient determines the shape of radial heat transfer in submerged jets, while the Re number only controls the strength of heat transfer