Search results

Numerical Simulation of Turbulent Fluid Flow and Heat Transfer Characteristics in Heat
CFD Modeling of a Polymer Solar Collector: Renewable Energy, Vol.35, No.7 (2010), p.1499-1508
A Natural Extension of the Conventional Finite Volume Method into Polygonal Unstructured Meshes for CFD Application: Applied Mathematical Modelling, Vol.20 (1996), p.170-183

Influence of temperature and mixture stratification on HCCI combustion using chemiluminescence images and CFD analysis [J].
Charge stratification to control HCCI: Experiments and CFD modeling with n-heptane as fuel [J].
The simulation based on CHEMKIN for homogeneous charge compression ignition combustion with on-board fuel reformation in the chamber.

The theoretical analysis and numerical simulation for wall heat transferring process of the gas-infrared heated room is finished in this paper.
Simulations on Exterior Wall Heat Transfer Characteristics of Radiant Heating Room The Conditions of Numerical Simulation.
A numerical simulation on a gas heating plant was processed.
Simulation on Exterior Wall Surface Temperature Distribution.
CFD software is adopted to simulate the indoor temperature field, and the indoor temperature distribution of this plant is shown in Fig.3.

By the method of numerical simulation, researches on cylindrical exhaust ejector, lobed exhaust ejector and lobed exhaust ejector with twisted blades are conducted in this paper to study the effects of different ejector structures on flow field uniformity.
Numerical Simulation Lobed exhaust ejector uses lobe nozzle to strengthen mixing of secondary flow and primary flow to improve ejector coefficient, achieve adequate mixing in a very short axial distance.
To avoid the influence of mesh accuracy on flow, refined grids are adapted, which can improve simulation accuracy and control grid quantity.
Table 3 Ejector coefficient statistics Model I Model II Model III Ejector coefficient n 1.32 1.29 1.31 Conclusions Through numerical simulation of the cylindrical ejector, lobed ejector and lobed ejector with twisted blades, we can achieve conclusions as follows: 1.
Birk: Experimental and CFD Study of An Exhaust Ejector with Round Entraining Diffuser, in: Proceedings of ASME Turbo Expo 2007: Power for Land, Sea and Air.GT2007-27643 [5] Zhang J Z, Li L G, Wu G C: submitted to Journal of Nanjing University of Aeronautics&Astronautics.1996. (06), 745- 749

Brake disk Modeling Simulation Setup.
Brake Disk CFD Model Convection coefficient values changed according to the simulation time step.
Furthermore, the kinetic energy can then be used as the simulation input.
The simulation results were useful for the preliminary investigation and as a reference in brake disk design.
Play, Thermal contact simulation in 2-D and 3-D mechanisms, ASME Journal of Tribology 110 (1988) 247-252

Analyses on Effect of helix angle on the continuous helical baffles heat exchanger JiaZhu Zou1, a, FengWei Yuan1, b and Liang Bin Hu1, c 1 College of Mechanical Engineering, University of South China, Hengyang 421001, Hunan, China a xhwulai@163.com, b13386820@qq.com, c258518379@qq.com Keywords: continuous helical baffles; heat exchanger; helix angle; numerical simulation Abstract.
A numerical simulation for heat exchanger with continuous helical baffles was carried out.
A numerical simulation for heat exchanger with continuous helical baffles was carried out by using commercial codes of ANSYS CFD 12.0.
Meshing with numerical simulation method.
The results of numerical simulation and analysis Full development period of heat convection of shell side heat transfer and resistance performance.

Adopting the RSM (Reynolds stress model) to conduct numerical simulation on gas phase flow field in bypass cyclone separators with two kinds of inlet structure, meanwhile, interphase coupling discrete model DPM is used to simulate the trace of particles in bypass cyclone separator.
In the recent years, CFD technology is used more and more in computing the gas-solid field [1] in the separator as the technology develops fast.
Simulation Result Analysis.
Fig.4 demonstrates the change of downside flow along the axis in the separating part at the end of the chimney by numerical simulation and computation.
In numerical simulation, the inlet of separator B is divided into three different regions, the region near the wall, the region in the center part and the region far away from the wall.

The mesh was made with the support of ICEM-CFD 11.0, which after various refinements resulted in an unstructured mesh of 760,786 tetrahedral elements.
The simulations were run in a Quad Core 2.66 GHz, 8 GB of RAM and 1 TB of physical memory (HD) computer.
The simulation time of the cases studied ranged from 43 to 46 hours.
Table 2 - Data used in the simulation, considering the isothermal method.
In the simulations we used the conventional method of recovery with continuous injection of water under isothermal conditions.

The simulation results indicated that the effects of nozzles with different angles on the pressure at the thrustwall of PDE and nozzle outlet were not the same.
Since the design theory of PDE nozzle is not perfect, many numerical simulations were performed by domestic and overseas scholars in recent years.
Venkat [3] performed two-dimensional numerical simulation on PDE performance with convergent nozzles, divergent nozzles, convergent-divergent nozzles and straight nozzles for two different flight conditions, whose results indicated that the specific impulse of PDE with divergent nozzles was higher than that of PDE with other nozzles at a subsonic speed.
In order to obtain the effect rule of different nozzles with convergent and divergent angles on PDE performance, systematic numerical simulations on PDE with nozzles of different angles was carried out in this article.
Physical Model and Computing Method In this paper commercial CFD software Fluent was used for numerical simulation.

Simulation results demonstrate that the composite control system has good performance in tracking AOA and acceleration command by respective deflection in cruise.
The position and efficiency of wings are carefully optimized by CFD computation.
The control system structure of hypersonic vehicle Simulations of Composite Control System Assuming the hypersonic vehicle flight height , the velocity (), the trim angle of attack ,and the command of the velocity (), and while the scramjet engine is power on, the command of the normal maneuver acceleration.
The simulations of the composite control system are shown as follows.
Simulation results show that the composite control system can separately trail the command of velocity, AOA and normal maneuver acceleration accurately, and the normal maneuver acceleration doesn’t affect the AOA in cruise.