Simulation Analysis of the Effect of Slit/Slot Pintle Geometry on Atomization of Bipropellant Engine-Reference-Cited by-同舟云学术

Simulation Analysis of the Effect of Slit/Slot Pintle Geometry on Atomization of Bipropellant Engine

Published:2023-08-17 Issue:8 Volume:11 Page:2471
ISSN:2227-9717
Container-title:Processes
language:en
Short-container-title:Processes

Author:

Cai Kun¹,Zhang Zhen¹²^ORCID,Wang Fengshan¹,Hu Yu¹,Wang Xudong¹^ORCID,Fang Zhicheng¹,Mao Xiaofang¹,Yao Zhaopu¹,Yu Yusong²^ORCID,Li Haiwang³

Affiliation:

1. Beijing Institute of Control Engineering, Beijing 100190, China

2. Hydrogen Energy and Space Propulsion Laboratory (HESPL), School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

3. Tianmushan Laboratory, Hangzhou 310023, China

Abstract

In order to optimize the slit/slot geometry design of a bipropellant pintle injector, the impinging spray development of a pintle injector was numerically investigated. The VOF (volume of fluid) and LES (large eddy simulation) methods were employed for an analysis to capture the gas–liquid interface by means of the AMR (adaptive mesh refinement) method. In those simulation cases, different flowrates, slot numbers, pintle diameters, slot thicknesses and slot shapes were compared for an analysis. In a comparison of visualization and quantification, a high flowrate and large pintle diameter were shown to be more positive features for improving the atomization quality and mixing effect. As for the slot parameters and shape, the spray development was mainly determined by the flow proportion between the slit jet and slot jet. The simulation results indicated that dominant slot jets cause a more dispersed spatial distribution, which is more conducive to the subsequent improvement of combustion efficiency in a limited space. However, an excessive increase in the number of slot jets can weaken the overall atomization quality and mixing effect, so it is suggested to ensure a balance for geometry design optimization.

Funder

The National Key R&D Program of China

Publisher

MDPI AG

Subject

Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering

Link

https://www.mdpi.com/2227-9717/11/8/2471/pdf

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