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《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:

2023年02期

Page:

15-26

Research Field:

目次

Publishing date:

Info

Title:

Numerical simulation on spray field of liquid-liquid pintle multi-injector elements

Author(s):

WANG Kai¹;  TANG Liang¹;  LEI Fanpei²;  YANG Anlong¹;  ZHOU Lixin¹

(1.Key Laboratory for Liquid Rocket Engine Technology, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China; 2.China State Shipbuilding Corporation, Beijing 100044, China)

Keywords:

liquid-liquid pintle injector;  adjacent injector elements;  interaction;  spray field structure;  adaptive mesh refinement

PACS:

V434.3

DOI:

-

Abstract:

In order to study the influence of the interaction between adjacent injector elements on the spray field in pintle injector, taking the plane pintle multi-injector element as the research object, based on a new method of AMR(adaptive mesh refinement)technology and PLIC VOF(piecewise linear interface calculation VOF)method in which each phase was individually identified, the spray process of pintle injector was simulated with high-fidelity.The typical structure characteristics and spatial distribution characteristics of the spray field were demonstrated quantitatively.The spray field were compared with that of the injector element, and the mechanism of interaction between adjacent injector elements was revealed. The results show that the new simulation method has good accuracy in studying the spray field of pintle injector.Compared with the injector element, the spray field of the multi-injector element mainly has the following special structures:two adjacent spray fans collide to form a ridge structure on the back, and causing the spray area to exceed the spray angle area.In addition, two spray fans collide and converge on the middle symmetry plane to form a thin liquid film, which makes the droplets distribute throughout the spray angle area.A certain leakage rate and leakage width of liquid sheet are formed between two adjacent radial orifices.The droplet diameters of liquid sheet path and liquid jet path increase significantly by about 35, and the distribution of flow intensity and mixing ratio tends to be more uniform along the radial direction.The interaction mechanism between adjacent elements is as follows:after the collision of adjacent spray fans, the original outward deployed spray fans are pushed back to the central symmetry plane, whose thickness is twice that of the original spray fan.However, the thickness of the liquid film at other nonimpact positions remains unchanged.Finally, the structure of the spray fan is a flat multi-cavity structure.

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Memo

Memo:

-

Common functions

Last Update: 1900-01-01