Pressure rising slope variation accompanying with combustion mode transition in a dual-mode combustor

2017 ◽  
Vol 68 ◽  
pp. 370-379 ◽  
Author(s):  
Chenlin Zhang ◽  
Juntao Chang ◽  
Shuo Feng ◽  
Jicheng Ma ◽  
Junlong Zhang ◽  
...  
Keyword(s):  
Mode Transition ◽  
Combustion Mode ◽  
Dual Mode

Effect of Mach number and equivalence ratio on the pressure rising variation during combustion mode transition in a dual-mode combustor

2018 ◽  
Vol 72 ◽  
pp. 516-524 ◽  
Author(s):  
Chenlin Zhang ◽  
Juntao Chang ◽  
Jingxue Ma ◽  
Wen Bao ◽  
Daren Yu ◽  
...  
Keyword(s):  
Mach Number ◽  
Equivalence Ratio ◽  
Mode Transition ◽  
Combustion Mode ◽  
Dual Mode

scholarly journals Relationship of flame propagation and combustion mode transition of end-gas based on pressure wave in confined space

2020 ◽  
Vol 214 ◽  
pp. 371-386 ◽  
Author(s):  
Xiaojun Zhang ◽  
Haiqiao Wei ◽  
Lei Zhou ◽  
Xiaodong Cai ◽  
Ralf Deiterding
Keyword(s):  
Flame Propagation ◽  
Pressure Wave ◽  
Mode Transition ◽  
Confined Space ◽  
Combustion Mode ◽  
Relationship Of

A control-oriented hybrid combustion model of a homogeneous charge compression ignition capable spark ignition engine

2012 ◽  
Vol 226 (10) ◽  
pp. 1380-1395 ◽  
Author(s):  
Xiaojian Yang ◽  
Guoming G Zhu
Keyword(s):  
Homogeneous Charge Compression Ignition ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Combustion Model ◽  
Mode Transition ◽  
Compression Ignition ◽  
Combustion Mode ◽  
Combustion Phase ◽  
Compression Ignition Combustion ◽  
Homogeneous Charge

To implement the homogeneous charge compression ignition combustion mode in a spark ignition engine, it is necessary to have smooth mode transition between the spark ignition and homogeneous charge compression ignition combustions. The spark ignition–homogeneous charge compression ignition hybrid combustion mode modeled in this paper describes the combustion mode that starts with the spark ignition combustion and ends with the homogeneous charge compression ignition combustion. The main motivation of studying the hybrid combustion mode is that the percentage of the homogeneous charge compression ignition combustion is a good parameter for combustion mode transition control when the hybrid combustion mode is used during the transition. This paper presents a control oriented model of the spark ignition–homogeneous charge compression ignition hybrid combustion mode, where the spark ignition combustion phase is modeled under the two-zone assumption and the homogeneous charge compression ignition combustion phase under the one-zone assumption. Note that the spark ignition and homogeneous charge compression ignition combustions are special cases in this combustion model. The developed model is capable of simulating engine combustion over the entire operating range, and it was implemented in a real-time hardware-in-the-loop simulation environment. The simulation results were compared with those of the corresponding GT-Power model, and good correlations were found for both spark ignition and homogeneous charge compression ignition combustions.

Distributed parameter control arithmetic for an axisymmetrical dual-mode scramjet

2008 ◽  
Vol 112 (1135) ◽  
pp. 557-565 ◽  
Author(s):  
C. Tao ◽  
Y. Daren ◽  
B. Wen
Keyword(s):  
Control Theory ◽  
Shape Control ◽  
Distributed Parameter ◽  
Mode Transition ◽  
Dual Mode ◽  
Transition Control ◽  
Wide Range ◽  
Mode Transition Control ◽  
Control Arithmetic ◽  
Smooth Transitions

AbstractDual-mode scramjet is one of the candidates for hypersonic flight propulsion system which will be used in wide range of flight Mach numbers from 4 to 12 or higher, wherein dual-mode scramjet should be well designed to be suitable for subsonic/supersonic combustion operation according to the flight conditions. Therefore this system is required to operate in a finite number of operational modes that necessitate robust, stable, and smooth transitions between them by which selective operability of supersonic/subsonic combustion modes and efficient combustor operation in these modes may be realised. A key issue in making mode transition efficient and stable is mode transition control. The major problem in mode transition control is the handling of the various flow and combustion coupling effects of dual-mode scramjet whose physical states are spatially coupled and whose governing equations are partial differential equations. Involving these distributed parameter issues, our basic idea is using the shape control theory to study the control problems of mode transition for dual-mode scramjet with the aim of achieving the desirable design properties and increasing control reliabilities. This specific approach is motivated by the promise of novel techniques in control theory developed in recent years. Concrete control arithmetic of this approach, such as shape control model, sensitivity analysis and gradient-based optimisation procedure, are given in this paper. Simulation results for an axisymmetric, wall-injection dual-mode scramjet show the feasibility and validity of the method.

SI and HCCI Combustion Mode Transition Control of a Multi-Cylinder HCCI Capable SI Engine via Iterative Learning

2011 ◽  
Author(s):  
Xiaojian Yang ◽  
Guoming G. Zhu
Keyword(s):  
Control Strategy ◽  
Iterative Learning ◽  
Mode Transition ◽  
Combustion Mode ◽  
Operational Parameters ◽  
Ic Engine ◽  
Operational Conditions ◽  
Transition Control ◽  
Hcci Combustion ◽  
Mode Transition Control

The combustion mode transition between spark ignition (SI) and homogeneously charged compression ignition (HCCI) combustions of an internal combustion (IC) engine is challenging due to the distinct engine operational parameters over these two combustion modes and the cycle-to-cycle residue gas dynamics of the HCCI combustion. The control problem becomes even more complicated when multi-cylinder operation is involved. This paper studies the combustion mode transition problem of a multi-cylinder IC engine with dual-stage valve lifts and electrical variable valve timing systems. A control oriented engine model was used to develop a multistep mode transition control strategy via iterative learning for combustion mode transition between SI to HCCI with minimal engine torque fluctuations. The hardware-in-the-loop (HIL) simulations demonstrated the effectiveness of the developed control strategy for the combustion mode transition under both constant load and transient engine operational conditions.

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