| Lots of experiments home and abroad have approved that pulsed jet could enhance jet pump's energy and quality transmission efficiency. This dissertation, on the basis of the former study, simulated the steady and pulsed liquid jet pump's internal flow field, then did experiment research on the performance of pulsed liquid jet pump. The main contents of the dissertation can be described as follow:In chapter 1, the dissertation elaborated the significance and present situation of study towards pulsed jet; In chapter 2, it introduced the fundamental performance equation of steady and pulsed liquid jet pump, also introduced time-average equation, then did some theoretical researches on the velocity coefficients in the equations; In chapter 3, it introduced the conception of numerical simulation and its function, limiting, including its turbulence math model and the method of numerical calculation in common use. Then it gave a brief introduction of FLUENT; In chapter 4, the dissertation did numerical simulation towards steady and pulsed liquid jet pump's internal flow field by applying Computational Fluid Dynamics. It firstly did numerical simulation towards pulsed liquid jet pump's throat pipe when it was working on different area ratio, different length of throat pipe, different working situation. Then it analyzed and proposed the optimization length of throat pipe on pulsed liquid jet pump; In chapter 5, it did experimental study on the fundamental performance of steady and pulsed liquid jet pump, then compared the experiment result with numerical simulation result, this approximately agreed with each other. The analyse of this research that the optimization length of throat pipe on pulsed liquid jet pump is approximately correct. |
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