|Table of Contents|

Effect of piezoelectric excitation on jet fragmentation in vacuum environment(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2020年04期
Page:
46-53
Research Field:
研究与设计
Publishing date:

Info

Title:
Effect of piezoelectric excitation on jet fragmentation in vacuum environment
Author(s):
CHEN Pengfei1; 2; YAN Xiaoping3; SUN Ce2; HONG Liu1; 2; XIA Yizhi1; 2
(1. Science and Technology on Liquid Rocket Engine Laboratory,Xi’an 710100,China; 2.Xi’an Aerospace Propulsion Institute,Xi’an 710100,China; 3.Academy of Aerospace Propusion Technology,Xi’an 710100,China)
Keywords:
droplet generator;  vacuum environment;  piezoelectric excitation;  experimental measurement;  jet fragmentation
PACS:
V419
DOI:
-
Abstract:
Aiming at droplet generation technology in vacuum environment,the effects of piezoelectric excitation waveform,frequency and displacement on jet fragmentation were studied by experimental research. The results show that after the piezoelectric excitation of 3 μm is applied to the jet with diameter 0.5 mm at the theoretical optimal frequency,the breaking distance of the jet is shortened to about 90 mm. Compared with the sinusoidal and triangular waves,the jet breaking distance obtained by square wave excitation is the shortest. Near the optimal frequency,with the increase of excitation frequency,droplet diameter decreases,and jet breakup length decreases first and then increases. With the increase of piezoelectric displacement amplitude,jet breakup length decreases slightly. It is found that under the action of piezoelectric force,the excitation frequency has the great influence on jet characteristics,and the frequency corresponding to the shortest breaking distance is larger than the theoretical optimal frequency. The parameters such as excitation waveform and displacement amplitude have relatively small influence on jet breaking characteristics.

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Last Update: 2020-07-30