Modelling of Hybrid Rocket Flow-Fields with Computational Fluid Dynamics

Izham Izzat Ismail; Nur Husnina Aufa Rozainuddin; Norhuda Hidayah Nordin; Muhammad Hanafi Azami

doi:10.37934/cfdl.14.3.5367

Authors

Izham Izzat Ismail Department of Mechanical & Aerospace Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia
Nur Husnina Aufa Rozainuddin Department of Mechanical & Aerospace Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia
Norhuda Hidayah Nordin Department of Manufacturing and Materials Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia
Muhammad Hanafi Azami Department of Mechanical & Aerospace Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.37934/cfdl.14.3.5367

Keywords:

Hybrid rocket flow fields, CFD modeling, GOX paraffin, N2O paraffin

Abstract

A low regression rate is a major limitation in the hybrid rocket propulsion system. This paper is to study the regression rate characteristics of a cylindrical solid grain with cryogenic propellants. Paraffin (P) fuel is coupled with two types of oxidizers, namely gaseous oxygen (GOX) and nitrous oxide (N2O). ANSYS software is used as the CFD platform to observe the hybrid rocket flow-fields. The modelling values obtained from the pressure, temperature, velocity, and wall heat flux contours are used to calculate the hybrid rocket performance in terms of regression rate, thrust, specific impulse, characteristic velocity, and exit Mach number. The numerical results show that the mass-flow-inlet boundary conditions, initial design feature, and type of propellant play an important role in the enhancement of hybrid rocket performance. Result shows that enhanced of 68 % of the regression rate, 59 % of thrust, 6 % of specific impulse and exit Mach number, and % of characteristic velocity by improved 50% of mass flow rate. Due to the high flame temperature, the GOX/P propellants produce the best hybrid rocket motor compared with the others.

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Author Biographies

Izham Izzat Ismail, Department of Mechanical & Aerospace Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia

izhamizzatismail@gmail.com

Nur Husnina Aufa Rozainuddin, Department of Mechanical & Aerospace Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia

husninaaufa@gmail.com

Norhuda Hidayah Nordin, Department of Manufacturing and Materials Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia

norhudahidayah@iium.edu.my

Muhammad Hanafi Azami, Department of Mechanical & Aerospace Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia

hanafiazami@iium.edu.my

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