Dynamic Characteristics of Combustion Mode Transitions in a Strut-Based Scramjet Combustor Model

2013 ◽  
Vol 29 (5) ◽  
pp. 1244-1248 ◽  
Author(s):  
Wen Bao ◽  
Qingchun Yang ◽  
Juntao Chang ◽  
Youhai Zong ◽  
Jichao Hu
Keyword(s):  
Dynamic Characteristics ◽  
Combustion Mode ◽  
Scramjet Combustor ◽  
Mode Transitions

Characteristics of reaction zone in a dual-mode scramjet combustor during mode transitions

2020 ◽  
Vol 99 ◽  
pp. 105779 ◽  
Author(s):  
Wubingyi Shen ◽  
Yue Huang ◽  
Yancheng You ◽  
Lizhe Yi
Keyword(s):  
Reaction Zone ◽  
Dual Mode ◽  
Scramjet Combustor ◽  
Mode Transitions

Dynamic characteristics of a gliding arc plasma-assisted ignition in a cavity-based scramjet combustor

2020 ◽  
Vol 171 ◽  
pp. 238-244 ◽  
Author(s):  
Rong Feng ◽  
Jiajian Zhu ◽  
Zhenguo Wang ◽  
Mingbo Sun ◽  
Hongbo Wang ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Arc Plasma ◽  
Gliding Arc ◽  
Gliding Arc Plasma ◽  
Scramjet Combustor

Flatness-Based Control of Mode Transitions Between Conventional and Premixed Charge Compression Ignition on a Modern Diesel Engine With Variable Valve Actuation

2013 ◽  
Author(s):  
Carrie M. Hall ◽  
Dan Van Alstine ◽  
Gregory M. Shaver
Keyword(s):  
Diesel Engine ◽  
Gas Exchange ◽  
Diesel Combustion ◽  
Compression Ignition ◽  
Combustion Mode ◽  
Variable Valve Actuation ◽  
Advanced Combustion ◽  
Combustion Modes ◽  
Mode Transitions ◽  
Variable Valve

Energy needs in the transportation sector and strict emissions regulations have caused a growing focus on increasing engine efficiency while simultaneously minimizing engine out emissions. One method for accomplishing this is to leverage advanced combustion strategies which are efficient yet very clean. One such combustion mode is premixed charge compression ignition (PCCI). PCCI can lead to drastically lower emissions than conventional diesel combustion while still maintaining engine efficiencies; however, the engine operation region over which it can be utilized is limited. In order to take advantage of this advanced combustion mode, engines must be designed to move between conventional diesel combustion and PCCI. To achieve transitions between different combustion modes, a control strategy was developed which utilizes a extensively validated gas exchange model and flatness-based methods for trajectory planning and trajectory tracking to enable smooth transitions between different combustion modes on a modern diesel engine with variable valve actuation. Since the engine considered here has the ability to alter valve timings, the control method exploits both capabilities to control the gas exchange process as well as the effective compression ratio of the engine. Simulation results indicate that this flatness-based approach is effective in enabling mode transitions.

scholarly journals CH* Luminance Distribution Application and a One-Dimensional Model of the Supersonic Combustor Heat Release Quantization

2019 ◽  
Vol 36 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Z. P. Wang ◽  
H. B. Gu ◽  
L. W. Cheng ◽  
F. Q. Zhong ◽  
X. Y. Zhang
Keyword(s):  
Heat Release ◽  
Recirculation Zone ◽  
Subsonic Flow ◽  
Flow Characteristics ◽  
Combustion Mode ◽  
Dimensional Model ◽  
Dual Mode ◽  
One Dimensional ◽  
Scramjet Combustor ◽  
Standard Parameter

Abstract One-dimensional model is an important way to evaluate the performance and flow characteristics of dual-mode scramjet combustor. Current work is based on a modified one-dimensional model assisted by measurements acquired on a direct-connected scramjet facility. CH* images and gas-sampling facility have been employed to quantify heat release for optimizing one-dimensional model. The results show that modified one-dimensional model gives a better evaluation of axis parameters distribution, especially for Mach number, which is the standard parameter to evaluate combustion mode. The ram/scram mode derived by the analytical results has been investigated. Intensive heat release is beneficial to obtain more stable pre-combustion shock and subsonic flow in the recirculation zone.

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