3D numerical simulation of round horizontal thermal jets in flow
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摘要: 根据计算流体动力学理论,采用Realizable k-ε紊流模型和SIMPLEC算法,考虑浮力作用,利用有限体积法来离散求解流动环境中圆孔水平热射流的流动与传热控制方程,对流动环境中圆孔水平热射流进行了三维数值模拟,比较了不同流速比和不同射流出口温度条件下的流动特性和温度分布特性,得到了热射流轨迹的速度和温度衰减规律,分析了流速比和射流出口温度对热射流轨迹温度分布的影响。Abstract: According to the computational fluid dynamics theory and the finite volume method, the governing equations of flow and heat transfer are solved for round horizontal thermal jets in flow. Using the Realizable k-ε turbulence model and the semi-implicit method for pressure linked equations-consistent algorithm and considering the buoyancy effect, a 3D numerical simulation of round horizontal thermal jets is achieved in this study. Both flow characteristics and temperature distributions in thermal jets are studied through the numerical experiments conducted under different conductions of velocity ratios and outlet temperatures, and the impact of these conductions on temperature distributions is analyzed. As a result, both velocity and temperature attenuation regularities of thermal jets are found. The study illustrates the practical value of numerical models for the examination of the discharge of thermal wastewater.
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Keywords:
- round jet /
- numerical simulation /
- turbulence model /
- temperature difference /
- velocity radio
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