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渐扩切向槽式低压旋流喷嘴流场数值模拟 预览 被引量:6

NUMERICAL STUDY ON FLOW CHARACTERISTICS ABOUT ROTARY ATOMIZED NOZZLE WITH MICRO EXPANDED TANGENT CHANNEL AT LOW PRESSURE
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摘要 提出有渐扩切向槽式旋流雾化喷嘴的三维流动数学模型,并采用κ-ε/RNG模型,应用SIMPLE方法数值模拟了在切向槽不同渐扩角度θ时喷嘴内流场特性。结果表明:渐扩切向槽偏转角θ对其流场特性影响较大,偏转角θ为负值时,喷嘴出口处回流较大,θ为较大的正值,喷嘴内流体流动越易形成实心的锥体,但其能量损失增加较大,当偏转角θ=5.8°可实现喷嘴出口处无回流,且流动损失较小,雾化角也比较大。 Based on physics model and some suitable hypothesizes, the three dimensions mathematical models for micro-expanded tangent channel and swirling chamber are presented, and then the net columns of cross uniform and the SIMPLE method are used. In the end, the various numerical tests are carried out in order to investigate the flow characteristics and atomized performance of this nozzle at low pressure. The results are analyzed and shown: the angle θof the micro-expanded tangent channel plays an important role for the flow characteristics, if θ< 0, the circumfluence at the exit of the nozzle is obviously, and the θ> 0, the solid cone in nozzle are formed easily, but its energy loss is bigger. While the initial pressure po = 0.3 MPa, Ux,o = 0, Uy,o=0, Uz,o=-0.2 m/s, the circumfluence at the exit of the nozzle isn't exactly formed with θ= 5.8°.
作者 冉景煜 张力 RAN Jing-Yu ZHANG Li XIN Ming-Dao PAN Liang-Ming WU Cheng-Bo(Engineering Thermophysics Institute, Chongqing University, Chongqing 400044, China)
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2002年第5期 586-588,共3页 Journal of Engineering Thermophysics
基金 贵州省科委资助项目(No.1998-17)
关键词 渐扩切向槽 低压旋流喷嘴 流场 数值模拟 旋流雾化喷嘴 micro expanded tangent channel rotating atomized nozzle numerical study
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参考文献1

  • 1Suhas V Patanker.Numerical Heat Transfer and Fluid Flow[].Mc Graw-Hill.1980 被引量:1

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