旋风分离器进气管结构改进的数值模拟研究

Numerical Simulation Study on the Improvement of Intake Pipe Structure of Cyclone Separator

采用数值模拟和试验相结合的方法,首先通过试验数据与数值模拟结果的对比,在验证了数值模拟结果准确性的基础上,研究了缩口对旋风分离器流场结构及压降和分离效率的影响。研究结果表明:缩口对维持流场的稳定性具有较好的效果,且能够较大的减小升气管外壁的低速区。旋风分离器的压降和分离效率随缩口角度的增大而增大,当缩口角度为20°时,压降增加较小且对分离效率的提升较大,因此最佳的缩口角度为20°。

The effects of necking on the flow field structure and pressure drop and separation efficiency of the cyclone were studied first by comparing the test data with the numerical simulation results by the method of combining tests and numerical simulation after the accuracy of numerical simulation results was validated.The research results show that the necking has a better effect on maintaining the stability of the flow field and can reduce the low velocity region of the outer wall of the riser greatly.The pressure drop and separation efficiency of the cyclone increase with the increase of the necking angle.When the necking angle is 20°,the increase in pressure drop is relatively small,whereas the increase in separation efficiency is greater,so the best necking angle is 20°.