摘要
为研究结冰环境中热合成双射流激励器工作特性,采用离散相模型(discrete phase model,DPM),结合动网格方法,数值研究了结冰环境中来流速度、液滴含量、液滴直径对激励器工作特性的影响.结果表明,来流速度较小时,双射流激励器出口形成热合成射流融合区,由于热射流的加热作用,温度较高,环境中的过冷液滴难以进入激励器腔体;来流速度较大时,射流涡向激励器两侧脱落,液滴不断进入激励器腔体内,激励器加热效率降低.此外,过冷液滴含量、直径对激励器周围速度场影响可以忽略;随着过冷液滴浓度增加,液滴直径减小,激励器加热效率逐渐降低.
In order to investigate the working characteristics of the dual synthetic hot jet actuator in icing environment,the discrete phase model(DPM)combined with dynamic mesh method was used to study the influences of inlet velocity,droplet content and droplet diameter in icing environment on the characteristics of the actuator.The results show that when the inlet velocity is low,a fusion zone of synthetic hot jet is formed at the exit of the dual synthetic jet actuator.Because of the heating effect of the hot jet in the fusion zone,it is difficult for the supercooled droplets to enter the cavities of the actuator.When the inlet velocity is high,the vortices induced by the jets fall off to both sides of the actuator and the droplets continue to enter the cavities of the dual jet actuator,which makes the heating efficiency of the actuator decrease.Besides,the contents and the diameters of supercooled droplets almost do not affect the velocity filed of the dual synthetic jet actuator.With the increase of the concentration of supercooled droplets and the decrease of the droplet diameter,the heating efficiency of actuator decreases gradually.
作者
王小伟
张智慧
王娴
WANG Xiao-wei;ZHANG Zhi-hui;WANG Xian(State Key Laboratory for Strength and Vibration of Mechanical Structures,Shanxi Key Laboratory of Environment and Control for Flight Vehicle,School of Aerospace,Xi an Jiaotong University,Xi an 710049,China)
出处
《气体物理》
2022年第2期65-74,共10页
Physics of Gases
基金
国家数值风洞工程(NNW2019ZT2-B27)。
关键词
过冷液滴
热合成双射流
动网格
激励器特性
结冰环境
supercooled droplets
dual synthetic hot jets
dynamic mesh
actuator characteristics
icing environment
