TY - JOUR
T1 - Theoretical and Experimental Studies for the Transient Response of Cavity
AU - Hu, Jianping
AU - Liu, Zhenxia
AU - Zhu, Pengfei
AU - Lyu, Yaguo
N1 - Publisher Copyright:
© 2019, Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - During the transient state of aero-engine, cavity has evidently transient characteristics in the secondary air system. To investigate transient characteristics, theoretical and experimental studies were implemented for both static and rotating cavities. First of all, the typical transient response phenomena in secondary air system were investigated based on the basic concepts of the dynamic process. According to the basic theory of gas dynamics, the causes of transient phenomena were analyzed in two aspects, external disturbance, and system physical properties. Several dimensionless parameters were introduced to analyze the transient response characteristics of air system. Second, the experimental results of the static cavity indicated that the actual response time increased with the increase of the inlet pressure. The experimental results of the rotor-stator cavity showed that the low rotational speed on the response process had little effect, and the response time gradually increased when the speed continued to increase. Third, the test results of multiple components suggested that when the valve was opening the inlet pressure of the static cavity increased quickly and then reached a stable value, but the pressure of the static cavity, stable pressure cavity and rotor-stator chamber rose gradually. It was also obtained the actual response time of them was increased. The closer the measuring points were to the disturbance source, the shorter the delay time was.
AB - During the transient state of aero-engine, cavity has evidently transient characteristics in the secondary air system. To investigate transient characteristics, theoretical and experimental studies were implemented for both static and rotating cavities. First of all, the typical transient response phenomena in secondary air system were investigated based on the basic concepts of the dynamic process. According to the basic theory of gas dynamics, the causes of transient phenomena were analyzed in two aspects, external disturbance, and system physical properties. Several dimensionless parameters were introduced to analyze the transient response characteristics of air system. Second, the experimental results of the static cavity indicated that the actual response time increased with the increase of the inlet pressure. The experimental results of the rotor-stator cavity showed that the low rotational speed on the response process had little effect, and the response time gradually increased when the speed continued to increase. Third, the test results of multiple components suggested that when the valve was opening the inlet pressure of the static cavity increased quickly and then reached a stable value, but the pressure of the static cavity, stable pressure cavity and rotor-stator chamber rose gradually. It was also obtained the actual response time of them was increased. The closer the measuring points were to the disturbance source, the shorter the delay time was.
KW - experiment
KW - rotating cavity
KW - secondary air system
KW - static cavity
KW - transient response
UR - http://www.scopus.com/inward/record.url?scp=85074018786&partnerID=8YFLogxK
U2 - 10.1007/s11630-019-1189-2
DO - 10.1007/s11630-019-1189-2
M3 - 文章
AN - SCOPUS:85074018786
SN - 1003-2169
VL - 29
SP - 232
EP - 240
JO - Journal of Thermal Science
JF - Journal of Thermal Science
IS - 1
ER -