Journal of Propulsion and Energy ISSN:2734-1887(Print) 2765-0049(Online)

The heat transfer phenomenon of a liquid rocket engine has been studied using various equations for heat transfer coefficients. The heat transfer coefficient can be calculated using Prandtl-Taylor analogy and Bartz’s empirical equation, and its variations. Through 1D analysis of a liquid rocket engine with a regenerative cooling jacket, the effects of heat transfer coefficients with various semi-empirical equations were analyzed. The difference in heat transfer coefficient affects the heat transfer such as heat flux, gas-side wall temperature, pressure of coolant, and temperature of the coolant. The analysis results were compared to the result by CFD simulation to evaluate the characteristics of semi-empirical equations. The results showed that the heat transfer of a nozzle with regenerative cooling jacket could be simulated well through 1D cooling channel analysis. In addition, the modified Bartz equation showed the best result among various empirical equations.