Three-Dimensional Computational Fluid Dynamics Simulation of the Turbine Blades of a Micro Turbojet Engine

Abstract Micro turbojet engine has been widely used in both civil and military applications and their turbine blades are the key components that determine their performance. The paper analyses the influence of adjusting rotational speed and attack angle on the pressure ratio and kinetic energy efficiency of a typical type of micro turbojet engine named KJ66 using computational fluid dynamics in three-dimensional. The objective is to analyse a basic research methodology using CFD for future micro turbojet engine research and workshops to maximize efficiency. Once the related statistic and the aerodynamic performance characteristic are obtained, the attack angle and rotational speed of the turbine blade can be set respectively according to the actual requirements to meet the needs of users. Based on the simulation results, it can be derived that the highest efficiency is 93.46% at the attack angle change of -10° and rotational speed of 110000 rpm. However, the numerical simulation of other conponents such as nozzle are not included in this paper. Therefore, the results would be more accurate and convictive if the object of research can be extended to the entire micro turbojet engine.