scholarly journals Comparing the results of analytical method and numerical simulation method for supersonic flow over main wing of S-125 Neva/Pechora missle

2017 ◽  
Vol 20 (K1) ◽  
pp. 84-90
Author(s):  
Ha Nam Tran ◽  
Ngoc Anh Vu ◽  
Tuan Phuong Nam Le
Keyword(s):  
Numerical Simulation ◽  
Mach Number ◽  
Supersonic Flow ◽  
Analytical Method ◽  
Fluid Dynamic ◽  
Simulation Method ◽  
Turbulent Model ◽  
Ansys Software ◽  
Simulation Process ◽  
Meshing Process

This paper compares the results of Computational Fluid Dynamic (CFD) and analytical method when applying to the case of supersonic flow over main wing of S-125 Neva/Pechora surface-to-air missle. The theory of two-dimensional, steady, inviscid supersonic flow over oblique surface, equations of relations between Mach number, pressure, temperature of flow in front and behind of shock wave, details of MATLAB algorithm and Spalart-Allmaras turbulent model will be displayed in this paper. Meshing process had been done by Meshing module and numerical simulation process had been done by Fluent module of ANSYS software. The results of two methods were presented in graphs of Mach number, pressure, temperature distributions along the chord line of wing. The reasons of differences between two results will be presented at the end of this paper.

Research on Stability Bearing Capacity for Pole and Tower Compression Members with Two Legs Connection

2012 ◽  
Vol 214 ◽  
pp. 315-319
Author(s):  
Xian Lei Cao
Keyword(s):  
Numerical Simulation ◽  
Analytical Solution ◽  
Bearing Capacity ◽  
Analytical Method ◽  
High Strength ◽  
Simulation Method ◽  
Elastic Theory ◽  
Numerical Simulation Method ◽  
Stability Bearing Capacity ◽  
Compression Members

In order to research the stability bearing capacity of high strength pole and tower compression members, analytical method and numerical simulation method were used to study stability on high strength axial compression members. Researched the impact of different slenderness ratio, different cross-section factors on the bearing capacity; energy relationship was using in analytical method, the boundary conditions issue is simplified according to different end restraint capacity; the failure modes and stability bearing capacity of members were studied by numerical simulation. Compared with the experimental results show that the numerical simulation and elastic theory analytical solution overestimate the capacity of members, but the numerical results have better agreement than the elastic theory analytical solution, which can show the numerical simulation method is right. Experiment method can obtain more secure mechanical behavior of high-strength angle steel member with axial loading.

scholarly journals Numerical Simulation of Supersonic Carman Curve Bodies with Aerospike

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
HaiLong Zhao ◽  
Ke Peng ◽  
ZePing Wu ◽  
WeiHua Zhang ◽  
JiaWei Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mach Number ◽  
Supersonic Flow ◽  
Drag Reduction ◽  
Numerical Simulations ◽  
Reduction Methods ◽  
Reduction Effect ◽  
Supersonic Vehicles

Drag reduction is one of the important problems for the supersonic vehicles. As one of the drag reduction methods, aerospike has been used in some equipment because of its good drag reduction effect. In this paper, the numerical simulations of Carman curve bodies with different lengths of the aerospike and different radius of the flat cylindrical aerodisk in supersonic flow freestream are investigated. Based on the numerical simulations, the mechanism of drag reduction of the aerospike is discussed. The drag reduction effect influence of the parameters of the aerodisk radius and the aerospike length on the Carman curve body is analyzed. The aerodisk radius within a certain range is helpful for the drag reduction. The change of length of the aerospike has little effect on the drag of Carmen curve bodies. The drag reduction effect of the same aerospike becomes worse with the increase of the incoming Mach number.

Numerical Simulation of Series Experiments of Concrete Fracture

2011 ◽  
Vol 488-489 ◽  
pp. 270-273
Author(s):  
Ai Min Deng ◽  
Xiang Dong Wang ◽  
Dao Yuan Xu
Keyword(s):  
Numerical Simulation ◽  
Simulation Models ◽  
Simulation Method ◽  
Displacement Curve ◽  
Concrete Fracture ◽  
Ansys Software ◽  
Concrete Element ◽  
Concrete Material ◽  
Linear Characteristic ◽  
Concrete Materials

With progress of the computer technology and numerical simulation method, the numerical simulation of the fracture process of concrete materials has become possible. In this paper, the numerical simulation models of the two types of samples were carried out with the SOLID65 concrete element based on the ANSYS software platform. According to the results, the non-linear characteristic of the concrete material exhibited in the loading process is reflected by the phenomenon that the slope of the later stage shows some reduction in the simulated load - loading point displacement curve. That is to say, the behavior of the appearance and development of cracks can be simulated with SOLID65 concrete element in ANSYS.

Numerical Simulation Method of Tensile Behavior of Glass Fiber Laminates

2014 ◽  
Vol 919-921 ◽  
pp. 1386-1389
Author(s):  
Shao Chong Yang ◽  
Jian Hui Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Numerical Model ◽  
Glass Fiber ◽  
Test Data ◽  
Structural Characteristics ◽  
Simulation Method ◽  
Fe Analysis ◽  
Tensile Behavior ◽  
Ansys Software

Based on the structural characteristics of glass fiber laminates, a novel finite element numerical model of the laminates was proposed and established with ANSYS software. The results from the FE analysis are compared with available test data in the literature [1], which indicate the numerical model is reasonable and reliable. At same time, tensile behavior and shear behavior of the glass fiber laminates was analyzed. This study can provide reference for glass fiber laminates design and calculation, and has important practical value.

The Application of Two Dimensional Numerical Simulation Method of Ground Penetrating Radar in Concrete Dam Nondestructive Testing

2014 ◽  
Vol 1030-1032 ◽  
pp. 879-884
Author(s):  
Lan Chen ◽  
Ji Gen Liu ◽  
Yi Feng Wang ◽  
Jun Niu
Keyword(s):  
Numerical Simulation ◽  
Time Domain ◽  
Ground Penetrating Radar ◽  
Wave Theory ◽  
Simulation Method ◽  
Concrete Dam ◽  
Simulation Process ◽  
Working Principle ◽  
Ground Penetrating ◽  
Finite Different Time Domain

electromagnetic wave theory was used by ground penetrating radar, the defects in concrete dams were judged according to the measured concrete reflection waveform, frequency and wave velocity. The working principle of ground penetrating radar and numerical simulation process based on the finite different time domain method were studied, cracks, voids images in concrete was forward simulated by the above method. It was important to determine the quality defects in concrete.

Abrasion Simulation of a Reciprocating Seal

2012 ◽  
Vol 601 ◽  
pp. 253-257
Author(s):  
Xin Li ◽  
Gao Liang Peng ◽  
Wen Jian Liu
Keyword(s):  
Numerical Simulation ◽  
Surface Roughness ◽  
Working Conditions ◽  
Hydraulic System ◽  
Nonlinear Behavior ◽  
Simulation Method ◽  
Simulation Process ◽  
Elastomeric Material ◽  
Sealing Pressure ◽  
Sinusoidal Function

Modeling for the abrasion behavior of the rubber-like material is needed in designing a sliding seal in a hydraulic system. The abrasion mechanism of elastomeric material differs from metals or other polymers. In this paper the abrasion behavior of the seal was studied through numerical simulation method. An FE contact model was built. Considering the actual manufacturing situation, a sinusoidal function was used to describe the surface roughness of the rod. An abrasion algorithm based on the linear abrasion theory was adopted. The nonlinear behavior of the seal material and extreme working conditions were also considered. The birth and death element technology was used in the simulation process to imitate the loss of the material. The results displayed the worn profile of the seal and the influences to the sealing pressure caused by the working conditions outside and the roughness of the rod.

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