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Atomization and Sprays
Editor-in-Chief Europe: Günter Brenn (open in a new tab)
Editor-in-Chief Americas: Marcus Herrmann (open in a new tab)
Редактор-основатель: Norman Chigier (open in a new tab)

Выходит 12 номеров в год

ISSN Печать: 1044-5110

ISSN Онлайн: 1936-2684

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LAGRANGIAN APPROACH TO AXISYMMETRIC SPRAY SIMULATION OF PINTLE INJECTOR FOR LIQUID ROCKET ENGINES

Том 28, Выпуск 5, 2018, pp. 443-458
DOI: 10.1615/AtomizSpr.2018022652
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Краткое описание

Movable pintle injectors are installed in bipropellant rocket engines to control the mass flow rate of the propellants and allow deep throttling with high combustion performance. A thin liquid sheet is formed by ejecting the liquid radially around the end of the pintle. This sheet is broken by axially injecting a gas propellant from an annular gap around the pintle nozzle. The device features a movable pintle rod, which allows the thickness of the liquid sheet to be changed. The volume of fluid modeling is used to estimate the varying thickness of the liquid sheet, which is equal to the pintle opening up to a critical point. A procedure with these results calculates the constants in a mathematical model of the liquid sheet breakup process. The comparison of breakup model constants with the pintle opening shows that the drop size constant B0 has increased and the breakup time constant B1 has decreased up to the critical point of the pintle opening due to an increase in the liquid mass flow rate, which is changed after the critical point of the pintle opening due to a slight decrease with the increase in the liquid mass flow rate. Axisymmetric spray simulation of the pintle injector, varying the drop size constant and breakup time constant in the breakup model, was performed using the Lagrangian approach. As a result, the comparison of the simulation result with the experimental data of the spray angle and Sauter mean diameter shows that the simulation results obtained via the calculated constants depend on the varying liquid sheet thickness and exhibited a good agreement.

ЦИТИРОВАНО В
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  2. Zhang Yang, Yu Nanjia, Tian Hui, Li Wenda, Feng Hao, Experimental and numerical investigations on flow field characteristics of pintle injector, Aerospace Science and Technology, 103, 2020. Crossref

  3. Son Min, Lee Keonwoong, Koo Jaye, Characteristics of anchoring locations and angles for GOX/GCH4 flames of an annular pintle injector, Acta Astronautica, 177, 2020. Crossref

  4. Lee Suji, Koo Jaye, Yoon Youngbin, Effects of skip distance on the spray characteristics of a pintle injector, Acta Astronautica, 178, 2021. Crossref

  5. Xu Jiabao, Jin Ping, Li Ruizhi, Wang Jue, Cai Guobiao, Du Juan, Numerical Study on Combustion and Atomization Characteristics of Coaxial Injectors for LOX/Methane Engine, International Journal of Aerospace Engineering, 2021, 2021. Crossref

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  9. Zhou Wenyuan, Xu Xu, Yang Qingchun, Zhao Ronghui, Jin Yushu, Experimental and numerical investigations on the spray characteristics of liquid-gas pintle injector, Aerospace Science and Technology, 121, 2022. Crossref

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