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应用标准ｋ－ε湍流模型和混合有限分析方法，对均匀横流中三维线源型扩散器的正浮力射流近区特性进行了预报，分析了不同工况的流速和温度在断面上的分布，得出射流轨迹线随Ｒ变化的表达式，并分析讨论了浮射流的分叉现象及浮力对射流轨迹线的影响．
Using the standard k-ε turbulence model and the mixed finite analysis method, the near-field characteristics of the positive buoyant jet of a three-dimensional linear source diffuser in a uniform cross-flow were predicted. The distribution of flow velocity and temperature in different working conditions was also analyzed The expression of the trajectory of exit stream changes with R, and the bifurcation phenomenon of buoyant jet and the influence of buoyancy on the trajectory of jet are analyzed and discussed.