10N喷注器制造误差对其特性的影响研究

发布时间：2018-01-27 04:55

本文关键词： 喷注器离心式喷嘴雾化两相流数值模拟　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：承担10N喷注器的制造任务以来,由于造误差控制不到位,产品流量和雾化性能始终不稳定、一致性差,成为制约型号任务的瓶颈,因此为提高产品性能及合格率,开展制造误差对产品性能的影响研究。10N喷注器是确保卫星在轨运行轨道以及姿态的保持和调整的关键部件,通过本课题研究对于提高卫星姿态控制精确和运行寿命、降低产品制造成本、缩短同类产品开发周期具有重要意义。本文主要研究内容包括影响产品性能的主要制造误差因素,流场模型的建立及其网格划分,流体数值模拟相关模型及算法的确定以及主要制造误差对产品性能的影响程度。具体研究工作如下:通过对工作原理、结构以及制造工艺对产品特性的影响分析,确定了螺旋槽、径向及轴向间隙、喷口尺寸等因素的制造误差作为主要研究对象。在流体力学相关理论基础上,研究确定了RNGk-?湍流模型和VOF多相流模型,并建立了10N喷注器的内、外喷嘴流场模型。通过10N喷注器内、外喷嘴的雾化过程进行数值模拟计算,掌握了内部流动以及外部初始雾化的详细数据,得出了制造误差对流量和雾化角的影响程度。搭建了专用雾化试验平台,在数值模拟的基础上进一步开展雾化试验,获得了流量、雾化角及产品流量特性曲线相关数据,并最终确定了10N喷注器关键结构尺寸制造误差的尺寸控制范围。通过本课题研究,按照研究确定的10N喷注器关键尺寸及公差进行生产,产品合格率显著提高,降低了制造成本,缩短了生产周期,并为后续新型号喷注器的研制打下了良好基础。
[Abstract]:Since taking on the manufacturing task of 10N injector, the product flow rate and atomization performance are always unstable and the consistency is poor, which is the bottleneck restricting the model task because the error control is not in place. Therefore, in order to improve the product performance and the qualified rate, the research on the effect of manufacturing error on the product performance. 10N injector is the key component to ensure the satellite in orbit orbit and attitude maintenance and adjustment. This research can improve the precision and service life of satellite attitude control and reduce the manufacturing cost. It is of great significance to shorten the development cycle of similar products. The main contents of this paper include the main manufacturing error factors that affect the product performance, the establishment of flow field model and its mesh generation. The related models and algorithms of fluid numerical simulation and the influence of main manufacturing errors on the performance of the product are determined. The specific research work is as follows: through the working principle. The influence of structure and manufacturing process on product characteristics is analyzed, and the manufacturing errors of spiral groove, radial and axial clearance, nozzle size and other factors are determined as the main research object. The study identified RNG -? The turbulent model and the VOF multiphase flow model are established, and the flow field model of the inner and outer nozzles of the 10N injector is established. The atomization process of the inner and outer nozzles in the 10N injector is numerically simulated. The detailed data of internal flow and external initial atomization are mastered, and the influence of manufacturing error on flow rate and atomization angle is obtained. A special atomization test platform is built. On the basis of numerical simulation, the atomization test was carried out, and the data of flow rate, atomization angle and flow characteristic curve were obtained. Finally, the dimension control range of the manufacturing error of 10N injector's key structure is determined. Through this research, the key dimensions and tolerances of 10N injector are produced according to the research. The qualified rate of the product is improved remarkably, the manufacturing cost is reduced, the production cycle is shortened, and a good foundation is laid for the development of the following new type injector.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V463

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