發(fā)布時間：2018-12-18 03:47

【摘要】：液氧泵的研制任務(wù)就是設(shè)計一臺高效率的液氧離心泵。以該泵為核心設(shè)備的地面液氧加注系統(tǒng)，能夠?qū)⒁貉鯊牡孛娓咂焚|(zhì)地泵送至長征系列運載火箭上的液氧貯箱。 本文研究了一種在國內(nèi)航天地面加注系統(tǒng)從未有過的，與全流道全三維流場的水力數(shù)值計算方法相結(jié)合的，“反－正－反”迭代耦合的新型水力設(shè)計方法，來設(shè)計確定液氧泵的水力參數(shù)。通過本文研究的新型水力設(shè)計方法研制出來的液氧離心泵，經(jīng)發(fā)射場試驗證明，其水力性能不僅完全滿足地面液氧加注系統(tǒng)的要求，并且泵效率較高。 這種迭代耦合新型水力設(shè)計方法的具體研究內(nèi)容為：先采用“反問題”設(shè)計，根據(jù)該液氧泵研制任務(wù)的參數(shù)特點——低比速離心泵，選擇適合于該具體工況低比速液氧離心泵的一維水力方法。再進(jìn)行“正問題”計算，，本文采用的是全流道全三維流場的CFD數(shù)值計算方法，通過正確選擇適合該類泵的計算模型和正確設(shè)置各項參數(shù)，該全流道全三維流場的數(shù)值計算收斂，并提供了一種直觀形象的流場形態(tài)，數(shù)值計算結(jié)果反應(yīng)了泵內(nèi)水力的真實情況、揭示出泵內(nèi)液流運動的規(guī)律、并能在計算機設(shè)計階段分析發(fā)現(xiàn)泵水力設(shè)計的問題和不足。“正問題”計算發(fā)現(xiàn)問題后，再通過“反問題”修改設(shè)計，“正問題”再次計算及分析。就這樣多次迭代耦合地反復(fù)修改水力設(shè)計，直至最終計算結(jié)果顯示，流場已最優(yōu)化。 通過這種新型水力設(shè)計方法的研究效果證實，該方法可以在設(shè)計階段即實現(xiàn)對泵性能的評價，從而設(shè)計出最優(yōu)化的離心泵，并大幅縮短研制周期和費用。研究出的這種實用有效的新型水力設(shè)計方法，將對提高今后的國內(nèi)航天加注等用泵的研制水平起到極大地推動作用。
[Abstract]:The research and development of liquid oxygen pump is to design a high efficiency liquid oxygen centrifugal pump. The surface liquid oxygen filling system with the pump as the core equipment can pump the liquid oxygen from the ground high quality to the liquid oxygen tank on the long March series carrier rocket. In this paper, a new hydraulic design method, which has never existed in the domestic space ground filling system, and which is combined with the hydraulic numerical calculation method of the full-channel three-dimensional flow field, is studied in this paper, which is coupled with the "anti-positive-inverse" iterative method. To design and determine the hydraulic parameters of the liquid oxygen pump. The liquid-oxygen centrifugal pump developed by the new hydraulic design method studied in this paper has been proved by the field test that its hydraulic performance not only fully meets the requirements of the surface liquid-oxygen filling system, but also has a high pump efficiency. The specific research contents of this iterative coupling new hydraulic design method are as follows: first, the "inverse problem" design is adopted, and according to the parameter characteristics of the research and development task of the liquid oxygen pump-low specific velocity centrifugal pump, A one-dimensional hydraulic method suitable for low specific speed liquid oxygen centrifugal pump was selected. Then the "positive problem" calculation is carried out. In this paper, the CFD numerical calculation method of the full three-dimensional flow field of the whole passage is adopted. The numerical calculation convergence of the full-channel three-dimensional flow field is obtained by selecting the calculation model and setting the parameters correctly for this kind of pump. The numerical results reflect the real situation of the hydraulic power in the pump, reveal the law of the fluid flow movement in the pump, and can be analyzed in the stage of computer design to find the problems and shortcomings of the hydraulic design of the pump. After the problem is discovered by "positive problem" calculation, the design is modified by "inverse problem", and the "positive problem" is calculated and analyzed again. In this way, the hydraulic design is modified repeatedly and iteratively until the final calculation results show that the flow field has been optimized. Through the research results of this new hydraulic design method, it is proved that this method can realize the evaluation of pump performance in the design stage, thus the optimum centrifugal pump can be designed, and the development cycle and cost can be greatly shortened. This practical and effective new hydraulic design method will play a great role in improving the development level of domestic spaceflight filling pump in the future.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH311

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