Experimental study on the spray characteristics of a pintle injector element

Zhou, Rui; Shen, Chibing

doi:10.1016/j.actaastro.2022.02.019

Cited by 20 publications

(2 citation statements)

References 29 publications

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“…For this reason, numerous research teams have studied the design and analysis of pintle-injector LPREs. However, they considered only the injection conditions and analyzed the performance under various injection conditions without optimizing the design studies [8][9][10][11][12][13][14][15][16][17][18]. Then, M. Son et al introduced a design process that optimizes operation based on experimental results under various injection conditions [19].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Approach to Optimize the Design of a Pintle Injector for LOX/GCH4 Liquid-Propellant Rocket Engine

2023

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This study presents an optimal design approach of a pintle injector for a deep throttlable liquid-propellant rocket engine (LPRE). Even though the pintle injector is used in rocket engines, it has become more important since reusable launch vehicles (RLVs) recently became a trend due to their economic and environmental benefits. However, since many variables must be determined to design a pintle injector, optimizing the pintle injector design is complicated. For this, we design a pintle injector to optimize the performance parameters; the spray angle, vaporization distance, and Sauter mean diameter (SMD). To confirm the approach, we design a pintle injector using an optimization method based on convex quadratic programming (CQP) for a 1000 N thrust and a throttle ability of 5 to 1 LPRE with liquid oxygen and gaseous methane. Then, we verify the performance using a numerical simulation. Through this work, we check the effectiveness of the optimization method for a pintle injector design.

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Section: Introductionmentioning

confidence: 99%

A Numerical Approach to Optimize the Design of a Pintle Injector for LOX/GCH4 Liquid-Propellant Rocket Engine

2023

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“…In Korea, at Chungnam National University, spray patterns and combustion performance were observed for various canted slit-type pintle injectors [14][15][16]. Zhou conducted an experimental study on the spray characteristics of a pintle injector element, showing that the circular hole and the square hole had a larger angle than the rectangular hole at the same injection area and velocity under the large TMR condition [17]. Chen found that the spray distribution and spray development are mainly controlled by the interaction of the radial flow of the jet and the axial flow of the film, as well as to some degree by the impingement of the liquid droplets in the spray center [18].…”

Section: Introductionmentioning

confidence: 99%

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

Cai,

Zhang,

Wang

et al. 2023

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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.

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