Analysis on impulse characteristics of pulse detonation engine with nozzles

Author:

Huang Xiao-long1,Li Ning1,Kang Yang1,Wang Hui2,Weng Chun-sheng1

Affiliation:

1. National Key Laboratory of Transient Physics, Nanjing University of Science and Technology , Nanjing 210094 , China

2. School of Physical and Mathematical Sciences, Nanjing Tech University , Nanjing 211816 , China

Abstract

Abstract In order to study the influence of different nozzle configurations on the gas–liquid two-phase pulse detonation engine (PDE) propulsion performance, the measurement system based on the tunable diode laser absorption spectroscopy (TDLAS) technology is built to measure the velocity and the temperature, while the high frequency dynamic pressure sensor is used to measure the nozzle gas pressure. Based on the momentum principle, the contribution mechanism of unsteady gas jet on thrust is obtained indirectly by TDLAS data. The results show that the impulses of PDE with non-nozzle, convergent nozzle, divergent nozzle and convergent–divergent nozzle are 1.95, 2.08, 1.85 and 2.16 N∙s within 20 ms of the exhaust period, respectively. The analysis reveals that the impulses of PDE with convergent and convergent–divergent nozzles are larger than that with non-nozzle, while the impulse of PDE with divergent nozzle is smaller than that with non-nozzle. The research results in this paper can provide reference for the design of nozzles for PDE.

Publisher

Walter de Gruyter GmbH

Subject

Aerospace Engineering

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