Analysis of design parameters of fuel injector used in liquid propellant rocket engine

Abstract

Performance of the liquid rocket engine is considered to be significant not only in terms of type of the fuel, fuel tank and structure used but also flow rate of the fuel takes prime importance in enhancing the engine performance. Variation in flow rate normally altered to greater extent by varying the design parameters of the fuel injectors. Keeping this in mind, the present study aims to alter the design parameters of pintle injector by changing the dimension such as diameter, impinging angle and L-open (fuel exit) by introducing orifice plate outlet of fuel injector to decrease the area and increase the velocity of fuel through designing CATIA model for fuel injector and to perform simulation using ANSYS workbench. The prime objective of the present study is to increase fuel flow rate and make it better comparable to the existing one. Implementing new design of pintle fuel injector by referring the standard value and study the fuel behaviour in the pintle injector. The present work also aims to improve the empirical design tools to get high performance of an engine and to achieve the better stability of the fuel injector through parametric design and analysis through CFD simulation.