Simulation Investigations Of Combustion And Regenerative Cooling Of Tripropellant Liquid Rocket Engine Thrust

Concerning the physical process of the combustion and the heat transfer in the thrust chamber of the tripropellant liquid rocket engine, a numerical simulation method is developed about the interior combustion and the exterior regenerative cooling. And a reasonable mathematic model about the spray, evaporation, combustion and heat transfer of the propellant in engine is given. Many results which is identical with the hot trial run experiment are attained. At the same time, the correction of the academic model is testified.The physical character of the super-critical hydrogen in the regenerative cooling channel is studied : started with the physical character of the super-critical hydrogen , using the method of least square , figuring out the state equation which is applicable to the state from liquid to the super-critical in the super-critical pressure , the constrained convection and the heat transfer in the super-critical channel are simulated using the equation , the results of the simulation are identical with the experiment in the same condition . The correction and practicability of the state equation of the super-critical hydrogen which is put forward beforehand is proved. Furthermore, from the point of view of the effect among the molecules, the influence of the super-critical condition towards the physical parameter is analyzed, giving reasons for the production of the special character of hydrogen in the super-critical condition. The radiative heat transfer in the combustion chamber is simulated, the results of the simulation are identical with the traditional academic analysis, which is approved the reliability of using the model of radiation to calculate the radiative heat transfer in the thrust chamber.Based on the mathematical model, the subscale and full-scale engine model are simulated separately. The effects of different injections and different length of the combustion chamber towards the performance of the engine are compared. And many important conclusions are achieved.