Papers by Author: Yan Peng Qu

Abstract: The general characteristic of current plate heat exchangers is first summarized in this paper. A new plate exchanger of multi-stream under high pressure is proposed, which is composed of the plates with opening the gyroidal flow-trough along the radius and the shell, it has some advantages, such as simple structure, high efficiency and available under high pressure. We introduce the structure of the plate, the shell and the slotting types. In addition, the process calculation method of heat-transfer is given and the strength calculation method for the key components of the novel exchanger is also presented. According to the stress analysis to the plate wall with ANSYS software, we have proved the reliability of the calculation method.

Abstract: Non-Dimensional Design Method (NDDM) for pressure vessels may simplify the design process, reduce the human resource, and it can substitute for the traditional method. The principles and steps of the NDDM were presented. In the method, we constructed two kinds of non-dimension parameters through introducing referenced dimension and pressure. Non-dimensional data of the opening reinforcement structure of pressure vessels were attained. In order to validate the results, two pressure vessels with same structure and different computing pressure and size were designed. The correctness was checked by the present standards. It showed that the NDDM could be applied briefly and reliable.

Abstract: Based on the creative design of nozzle structure, the application fields of the micro-particles production using supercritical fluids (SCF) can be further broaden. According to the analysis of the structural characteristics of the nozzles, a new kind of nozzle with a tunable annular gap is proposed in this research, which includes a cover, movable trays, unmovable trays, seal fittings and connecting components. By virtue of FLUENT software, the flow field of the nozzle in outer mixing mode with two passages is numerically simulated. The effects of the passing length of SCF before mixing and the height of conic convexity on the flow-field are analyzed. The simulation results show that the above length does adverse effect on enhancing mixing extent, however, the smaller height of convexity can help achieve better mixing level. Then the nozzle is redesigned in which a movable tray and an unmovable tray are removed. The improved nozzle has simple and reasonable structure and can do better work on improving gas-liquid mixing extent.