Experimental and numerical investigation on hysteresis characteristics and formation mechanism for a variable geometry dual-mode combustor

2017 ◽  
Vol 67 ◽  
pp. 96-104 ◽  
Author(s):  
Shuo Feng ◽  
Juntao Chang ◽  
Chenlin Zhang ◽  
Youyin Wang ◽  
Jicheng Ma ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Formation Mechanism ◽  
Variable Geometry ◽  
Dual Mode ◽  
Hysteresis Characteristics

Numerical Investigation of Cowl Lip Adjustments for a Rocket-Based Combined-Cycle Inlet in Takeoff Regime

2016 ◽  
Vol 33 (3) ◽  
Author(s):  
Lei Shi ◽  
Xiaowei Liu ◽  
Guoqiang He ◽  
Fei Qin ◽  
Xianggeng Wei ◽  
...  
Keyword(s):  
Numerical Integration ◽  
Numerical Investigation ◽  
Flow Separation ◽  
Static Condition ◽  
Combined Cycle ◽  
Variable Geometry ◽  
Overall Performance ◽  
Negative Impacts

AbstractNumerical integration simulations were performed on a ready-made central strut-based rocket-based combined-cycle (RBCC) engine operating in the ejector mode during the takeoff regime. The effective principles of various cowl lip positions and shapes on the inlet operation and the overall performance of the entire engine were investigated in detail. Under the static condition, reverse cowl lip rotation in a certain range was found to contribute comprehensive improvement to the RBCC inlet and the entire engine. However, the reverse rotation of the cowl lip contributed very little enhancement of the RBCC inlet under the low subsonic flight regime and induced extremely negative impacts in the high subsonic flight regime, especially in terms of a significant increase in the drag of the inlet. Changes to the cowl lip shape provided little improvement to the overall performance of the RBCC engine, merely shifting the location of the leeward area inside the RBCC inlet, as well as the flow separation and eddy, but not relieving or eliminating those phenomena. The results of this study indicate that proper cowl lip rotation offers an efficient variable geometry scheme for a RBCC inlet in the takeoff regime.

Slug formation mechanism for air–water system in T-junction microchannel: a numerical investigation

2018 ◽  
Vol 72 (11) ◽  
pp. 2921-2932 ◽  
Author(s):  
Wasim Khan ◽  
A. K. Chandra ◽  
K. Kishor ◽  
Sadhana Sachan ◽  
M. Siraj Alam
Keyword(s):  
Numerical Investigation ◽  
Formation Mechanism ◽  
Water System

Numerical studies for performance improvement of a variable geometry dual mode combustor by optimizing deflection angle

2017 ◽  
Vol 68 ◽  
pp. 320-330 ◽  
Author(s):  
Shuo Feng ◽  
Juntao Chang ◽  
Yuanshi Zhang ◽  
Chenlin Zhang ◽  
Youyin Wang ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Deflection Angle ◽  
Variable Geometry ◽  
Dual Mode ◽  
Numerical Studies

scholarly journals Numerical investigation of mode transition and hysteresis in a cavity-based dual-mode scramjet combustor

2019 ◽  
Vol 94 ◽  
pp. 105420 ◽  
Author(s):  
Xu Zhang ◽  
Lianjie Yue ◽  
Tinglong Huang ◽  
Qifan Zhang ◽  
Xinyu Zhang
Keyword(s):  
Numerical Investigation ◽  
Mode Transition ◽  
Dual Mode ◽  
Scramjet Combustor
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