2023 Vol. 44, No. 9

A Special Topic on Turbulent Combustion and Atomization
2023, 44(9): ⅰ-ⅰ.
Abstract(415) HTML (203) PDF(58)
Abstract:
Application of Enthalpy Deficit Flamelet Model in Spray Combustion Simulation
HE Junyi, LI Feng, HU Qun, WANG Lipo
2023, 44(9): 1017-1030. doi: 10.21656/1000-0887.440064
Abstract(594) HTML (286) PDF(95)
Abstract:
An OpenFOAM-based solver for spray combustion simulation with the large eddy simulation (LES) and the flamelet generated manifold (FGM) method, was developed. A simple reduction of the temperature was employed to account for the evaporative heat loss. The solver was firstly validated against the Syd...
Modelling Intermediate Species in Partially Premixed Turbulent Combustion Based on the LES-FGM Method
ZHANG Weijie, WANG Jinhua, HU Guangya, LI Deli, WANG Ziqi, HUANG Zuohua
2023, 44(9): 1031-1041. doi: 10.21656/1000-0887.440068
Abstract(639) HTML (268) PDF(80)
Abstract:
The LES of partially premixed turbulent flame MRB in TU Darmstadt was conducted based on the flamelet-tabulated combustion model FGM, and effects of premixed and partially premixed tabulations on the modelling results were studied. The results show that, different methods of tabulation exhibit limit...
Numerical Analysis of Flame Flashback and Instability in Cavity-Stabilized Supersonic Combustion
XIAO Yexin, JIN Tai
2023, 44(9): 1042-1053. doi: 10.21656/1000-0887.440103
Abstract(628) HTML (237) PDF(66)
Abstract:
Aimed at the phenomenon of flame flashback and low-frequency combustion oscillation in the scramjet combustor with equal straight cross sections, 3D simulations were conducted, with the hybrid RANS/LES method (delayed detached-eddy simulation, DDES) for turbulence modeling and the partially stirred ...
Breakup and Atomization Characteristics of Liquid Jets in Strong Swirling Crossflow Based on the VOF-LPT Method
XIE Mingyun, PU Tianhao, LIU Hong, WU Shengqi
2023, 44(9): 1054-1069. doi: 10.21656/1000-0887.440110
Abstract(820) HTML (389) PDF(101)
Abstract:
The liquid jet breakup and atomization interacting with a strong swirling crossflow is of significance in designing advanced aeroengines. The Eulerian-Lagrangian method was utilized to simulate the jet breakup and atomization processes. The volume of fluid (VOF) method was employed to track the gas-...
Low-Order Predictions of Spatial Distributions of Conserved Scalars in Swirl Combustors Based on the Gaussian Plume Function
WU Ziheng, ZHANG Chi, ZHANG Shihong, WANG Bosen
2023, 44(9): 1070-1086. doi: 10.21656/1000-0887.440119
Abstract(749) HTML (274) PDF(77)
Abstract:
The mixture fraction is a conserved scalar characterizing the fuel-air mixing. As a key reference scalar for turbulent combustion modelling, its spatial distribution is usually obtained through 3D numerical simulation, which are, however, time-consuming and costly for combustors with complex geometr...
Numerical Simulation Study of Spray Wall Impingement Combustion
QIN Wenjin, HAN Tianxiang, ZHANG Zhendong, SUN Yuedong
2023, 44(9): 1087-1096. doi: 10.21656/1000-0887.440077
Abstract(517) HTML (274) PDF(56)
Abstract:
Fuel spray wall impingement is a common phenomenon in small high-pressure direct injection diesel engines. Fuel spray wall impingement influences the in-cylinder combustion process, and significantly impacts the engine's dynamics, fuel economy, and emissions. To better understand the combustion char...
Solid Mechanics
Influences of Impact Points on the Penetration Depth of Reinforced Concrete
HUANG Chenglong, CHEN Yeqing, LI Shutao, ZHANG Sheng, WANG Zhenqing
2023, 44(9): 1097-1111. doi: 10.21656/1000-0887.440016
Abstract(594) HTML (166) PDF(55)
Abstract:
In the research field of projectile penetration into reinforced concrete, the penetration depth discreteness generally exists in experiments and empirical formulas, and the difference of impact positions is one of the main reasons for this discreteness. To explore the penetration depth discreteness ...
Finite Integral Transform Solutions for Free Vibrations of Rectangular Thin Plates With Mixed Boundary Constraints
LI Yihao, XU Dian, CHEN Yiming, AN Dongqi, LI Rui
2023, 44(9): 1112-1121. doi: 10.21656/1000-0887.440051
Abstract(714) HTML (272) PDF(83)
Abstract:
Analytical solutions, with unique research value, can serve as benchmarks for empirical formulas and numerical methods, a tool for rapid parameter analysis and optimization, and a theoretical basis for experimental designs. Conventional analytical methods, e.g., the Lévy solution method, are only ap...
The Mindlin-Medick Plate Theory and Its Application Under Flexoelectricity and Temperature Effects
LU Shuang, LI Dongbo, CHEN Jingbo, XI Bo
2023, 44(9): 1122-1133. doi: 10.21656/1000-0887.440017
Abstract(758) HTML (215) PDF(65)
Abstract:
Based on the Hamiltonian variational principle, the 2D field equations and boundary conditions for flexoelectricity were derived, and the corresponding governing equations were obtained through substitution of the constitutive relation and geometric equations into the field equation. The in-plane te...
Topology Optimization Design of Heat Convection Problems With Variable-Density Cells
WANG Qin, LIU Liyang, QIANG Bo, WEI Yanqiang
2023, 44(9): 1134-1144. doi: 10.21656/1000-0887.430383
Abstract(561) HTML (209) PDF(64)
Abstract:
The method of designing cell structures with variable-density cells based on erode-dilate operators was applied to the optimization of thermal structures. A series of variable-density microstructures with the same topology definition but different volume fractions were obtained with erode-dilate ope...
Elastic Analysis of Anisotropic Rotating Sandwich Circular Ring With a Functionally Graded Transition Region
PENG Xulong, XIE Xiaopeng, HUANG Haiping, WEI Wenchao, TANG Xuesong
2023, 44(9): 1145-1156. doi: 10.21656/1000-0887.440003
Abstract(513) HTML (182) PDF(53)
Abstract:
The elastic analysis of anisotropic rotating sandwich ring with a functionally graded transition region was carried out. Like the shell sandwich structure in nature, the ring is composed of 3 well-bonded regions, of which the inner and outer regions are made of homogeneous anisotropic materials, and...