Influence of Thrust Level on the Architecture and Optimal Working Process Parameters of a Small-scale Turbojet for UAV

2017 International Conference on Aerospace Technology, Communications and Energy Systems

航空航天工程;无线电电子学;能源学

Kuz'Michev, V.S.^1 ; Filinov, E.P.^1 ; Ostapyuk, Ya A^1

Department of Aircraft Engine Theory, Institute of Engine and Power Plant Engineering, Samara National Research University, Moskovskoye Shosse 34, Samara

443086, Russia^1

关键词: Maximum Efficiency;    Optimal values;    Optimization criteria;    Overall pressure ratios;    Specific fuel consumption;    Thrust levels;    Turbine inlet temperature;    Working process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/302/1/012022/pdf
DOI  :  10.1088/1757-899X/302/1/012022

学科分类：航空航天科学

来源: IOP

【 摘 要 】

This article describes how the thrust level influences the turbojet architecture (types of turbomachines that provide the maximum efficiency) and its working process parameters (turbine inlet temperature (TIT) and overall pressure ratio (OPR)). Functional gasdynamic and strength constraints were included, total mass of fuel and the engine required for mission and the specific fuel consumption (SFC) were considered optimization criteria. Radial and axial turbines and compressors were considered. The results show that as the engine thrust decreases, optimal values of working process parameters decrease too, and the regions of compromise shrink. Optimal engine architecture and values of working process parameters are suggested for turbojets with thrust varying from 100N to 100kN. The results show that for the thrust below 25kN the engine scale factor should be taken into the account, as the low flow rates begin to influence the efficiency of engine elements substantially.