TY - GEN
T1 - Effect of geometry and operation conditions on transient response characteristics for the static cavity
AU - Hu, Jianping
AU - Liu, Zhenxia
AU - Zhu, Pengfei
AU - Lyu, Yaguo
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - In the transient process or the emergency situation of engine, the fluctuation of the secondary flow is not consistent with the mainstream. In pursuit of safety during transient state, transient response characteristics for the system and components become an important subject. This paper focuses on a static cavity connected multi-holes, which has pretty evident characteristics in the system, and the object is to establish a similarity model to deduce the pressure at different time and to carry out experiments to evaluate some effects in the form of non-dimensional parameters. Based on the adiabatic assumption, the similarity analysis for a cavity connected multi-holes is carried out based on the adiabatic assumption. The non-dimensional gradient pressure can be expressed as the function related to non-dimensional area, pressure, and discharge coefficient. Then, a series of experiments have been carried out. The first group of experiments is used to obtain the effect of different levels of the inlet pressure disturbance. The results show it affects the response pressure significantly, but the change of the response time coefficient is not obvious. Also, another group of experiments are set to identify the effects of the different positions of exit or feed holes, and no distinct difference is observed. The third group are set to measure the transient response processes for the cases with the different area of exit holes or feed holes. The response regulation of the dimensionless pressure is related to the area ratio of the feed holes to exit holes.
AB - In the transient process or the emergency situation of engine, the fluctuation of the secondary flow is not consistent with the mainstream. In pursuit of safety during transient state, transient response characteristics for the system and components become an important subject. This paper focuses on a static cavity connected multi-holes, which has pretty evident characteristics in the system, and the object is to establish a similarity model to deduce the pressure at different time and to carry out experiments to evaluate some effects in the form of non-dimensional parameters. Based on the adiabatic assumption, the similarity analysis for a cavity connected multi-holes is carried out based on the adiabatic assumption. The non-dimensional gradient pressure can be expressed as the function related to non-dimensional area, pressure, and discharge coefficient. Then, a series of experiments have been carried out. The first group of experiments is used to obtain the effect of different levels of the inlet pressure disturbance. The results show it affects the response pressure significantly, but the change of the response time coefficient is not obvious. Also, another group of experiments are set to identify the effects of the different positions of exit or feed holes, and no distinct difference is observed. The third group are set to measure the transient response processes for the cases with the different area of exit holes or feed holes. The response regulation of the dimensionless pressure is related to the area ratio of the feed holes to exit holes.
KW - Experiment
KW - Multi-holes
KW - Secondary Air System
KW - Static cavity
KW - Transient response
UR - http://www.scopus.com/inward/record.url?scp=85074824473&partnerID=8YFLogxK
U2 - 10.1109/ICMAE.2019.8880991
DO - 10.1109/ICMAE.2019.8880991
M3 - 会议稿件
AN - SCOPUS:85074824473
T3 - 2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019
SP - 464
EP - 469
BT - 2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering, ICMAE 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th IEEE International Conference on Mechanical and Aerospace Engineering, ICMAE 2019
Y2 - 22 July 2019 through 25 July 2019
ER -