航空学报 > 1989, Vol. 10 Issue (8): 443-446

通过进排气总压比EPR测推力的基本原理

崔济亚   

  1. 北京航空航天大学
  • 收稿日期:1988-03-26 修回日期:1900-01-01 出版日期:1989-08-25 发布日期:1989-08-25

BASIC PRINCIPLES OF MEASURING THRUST THROUGH EXHAUST TO INLET TOTAL PRESSURE RAT10-ENGINE PRESSURE RATIO EPR

Cui Jiya   

  1. Beijing University of Aeronautics and Astronautics
  • Received:1988-03-26 Revised:1900-01-01 Online:1989-08-25 Published:1989-08-25

摘要:

涡轮发动机一直是通过转速来操纵的。可是同一转速而进气总温变时状态也变,低总温时增压比、推力就高,高总温时则相反。凶此按与推力较直接联系的参数来操纵就有可取之处。普惠公司JT3D-9D系列发动机已用进排气总压比、简称发动机总压比EPR=p5~*/p1~*作推力主操纵参数,而以转速操纵作备用。

关键词: EPR, 相似推力, 推力系数, 共同工作线

Abstract:

EPR (Engine Pressure Ratio), I.E.the ratio of exhaust to inlet total Pressure, has already been used in a lot of jet engines as the main operation control in place of the traditional engine rpm.In this paper, specific formulas to determine similarized thrust R/Po from EPR and flight Mach number are derived, which could be used to calculate or measure the engine thrust. Engineering applications of the basic principles are discussed for reference.

Key words: EPR, similarized thrust, thrust coefficient, matching line