scholarly journals The Application of Numerical Simulation Result for Geothermal Financial Model with Probabilistic Approach: A Comprehensive Study

2020 ◽  
Vol 417 ◽  
pp. 012020
Author(s):  
Nevi Cahya Winofa ◽  
Ade Lesmana ◽  
Heru Berian Pratama ◽  
Nenny Miryani Saptadji ◽  
Ali Ashat
Keyword(s):  
Numerical Simulation ◽  
Probabilistic Approach ◽  
Financial Model ◽  
Numerical Simulation Result ◽  
Comprehensive Study

Numerical Simulation of Muzzle Flow Field of Gun Based on CFD

2013 ◽  
Vol 291-294 ◽  
pp. 1981-1984
Author(s):  
Zhang Xia Guo ◽  
Yu Tian Pan ◽  
Yong Cun Wang ◽  
Hai Yan Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Stokes Equation ◽  
Wave Structure ◽  
Flow Fields ◽  
Single Equation ◽  
Navier Stokes ◽  
Turbulent Model ◽  
Navier Stokes Equation ◽  
Numerical Simulation Result

Gunpowder was released in an instant when the pill fly out of the shell during the firing, and then formed a complicated flow fields about the muzzle when the gas expanded sharply. Using the 2 d axisymmetric Navier-Stokes equation combined with single equation turbulent model to conduct the numerical simulation of the process of gunpowder gass evacuating out of the shell without muzzle regardless of the pill’s movement. The numerical simulation result was identical with the experimental. Then simulated the evacuating process of gunpowder gass of an artillery with muzzle brake. The result showed complicated wave structure of the flow fields with the muzzle brake and analysed the influence of muzzle brake to the gass flow field distribution.

The Research of Calculation Method on Vertical Natural Frequency of the New Full-Prefabricated Floor

2016 ◽  
Vol 846 ◽  
pp. 506-511
Author(s):  
Chong Fang Sun ◽  
Shu Ting Liang ◽  
Xiao Jun Zhu
Keyword(s):  
Numerical Simulation ◽  
Natural Frequency ◽  
Calculation Method ◽  
Variable Stiffness ◽  
Series Method ◽  
Numerical Simulation Result ◽  
Stiffness Method ◽  
Calculation Results ◽  
New Type ◽  
Test Result

New-type floor is composed of three kinds of slabs joined together through fittings. It is a kind of anisotropic two-way slab. In order to study the calculation method of natural frequency, series method, variable thickness method and variable stiffness method are adopted to calculate the natural frequency. The calculation results of three methods are compared with test result and numerical simulation result. The conclusion is that the calculation result of the variable stiffness method is the closest to the real natural frequency of new-type floor.

A Semi-Active Controller for an Aircraft Landing Gear Equipped with Magnetorheological Damper

2019 ◽  
Vol 894 ◽  
pp. 29-33
Author(s):  
Luong Quoc Viet ◽  
Jai Hyuk Hwang
Keyword(s):  
Numerical Simulation ◽  
Force Control ◽  
Hybrid Control ◽  
Mr Damper ◽  
Landing Gear ◽  
Operating Conditions ◽  
Magnetorheological Damper ◽  
Numerical Simulation Result ◽  
Aircraft Landing ◽  
Aircraft Landing Gear

The magnetorheological (MR) damper is the newest approach to replace the traditional passive damper which cannot change their dynamics in response to different operating conditions of the aircraft landing gear. This paper presents the simulation study of a semi-active controller for a landing gear equipped MR damper. Furthermore, a new method combined skyhook control with force control, called hybrid control, is developed to improve the performance of the MR damper landing gear. Finally, the numerical simulation result of the landing gear using SIMSCAPE-Simulink is discussed.

scholarly journals Numerical Simulation of Rotor in Hover and Forward Flight

2018 ◽  
Vol 179 ◽  
pp. 03011
Author(s):  
Qinghe Zhao
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Flow Field ◽  
Moving Grid ◽  
Steady State Flow ◽  
Forward Flight ◽  
Numerical Simulation Result ◽  
Structured Grid ◽  
Pressure Distributions ◽  
Good Agreement

The flow around rotor is numerical simulated in hover and forward flight based on multi-structured grid. In hover the flow field can be transformed into a steady-state flow field in the rotating coordinate system. The experimental data of Caradonna and Tung rotor is used to verify the numerical simulation result. The numerical results compare well with the experimental data for both non-lifting and lifting cases. Non-lifting forward flight is simulated and the prediction capabilities have been validated through the ONERA two-blade rotor. The pressure distributions of different positions under different azimuth angles are compared, which is in good agreement with the experimental data. There is unsteady shock wave when forward flight. Dual-time method is used to obtain unsteady flow field with rigid moving grid in the inertial system.

The Numerical Simulation of Hemispherical Parts Based on FBDF Technology

2014 ◽  
Vol 490-491 ◽  
pp. 644-648
Author(s):  
Lian Cheng Li ◽  
Ming Zhe Li ◽  
Yuan Ting Li
Keyword(s):  
Numerical Simulation ◽  
Material Parameter ◽  
Elasticity Modulus ◽  
Unit Area ◽  
Element Model ◽  
Material Surface ◽  
Damping Force ◽  
Numerical Simulation Result ◽  
Resistance To Deformation

in this paper, we mainly introduce the principle of the flexible blank drawer forming (FBDF), and establish the limited element model of the FBDF process. Then we make a numerical analysis on the hemispherical parts, and study the effect made on the result of shaping by damping force, friction coefficient as well as material parameter in per unit area. Through the analysis of the numerical simulation result, we can conclude that the greater the yield limit and elasticity modulus, the larger blank drawer force is required to form the shape; the more smooth the material surface, the less resistance to deformation will have. All this contributes to good quality of forming parts.

Optimization of a Novel Anthropomorphic Three-Jointed Underactuated Finger Mechanism

2013 ◽  
Vol 278-280 ◽  
pp. 647-653
Author(s):  
Hai Dong Luo ◽  
Yi Zhang ◽  
Hua Deng
Keyword(s):  
Numerical Simulation ◽  
Optimization Problem ◽  
Kinematic Characteristic ◽  
Motion Feature ◽  
Numerical Simulation Result ◽  
Coupling Motion ◽  
Human Finger ◽  
Underactuated Finger

A novel underactuated finger mechanism based on linkage and spring elements is proposed. The kinematic characteristic of the mechanism is analyzed to obtain the fingertip displacement and relationships between three joints. Considering the motion feature of human finger and actuation efficiency of the driving motor, the dimensional design of the finger mechanism is formulated as an optimization problem. The numerical simulation result shows that the finger mechanism can not only realize the anthropomorphic coupling motion, but also envelope objects with various shapes and sizes self-adaptively.

Numerical Simulation of Interaction of Cut-Off Wall and Earth-Rock Dam in the Reinforcement Project

2012 ◽  
Vol 170-173 ◽  
pp. 2181-2187
Author(s):  
Jiang Lin Gao ◽  
Zhi Gang Yang ◽  
Shu Wang Yan
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Stress Field ◽  
Design Method ◽  
Construction Technology ◽  
Seepage Field ◽  
Coupled Numerical Model ◽  
Coupling Calculation ◽  
Design Calculations ◽  
Comprehensive Study

Concrete cut-off wall has been widely used in the reinforcement project of earth-rock dam. Its design method and construction technology are comparatively mature, but comprehensive study of interaction of cut-off wall and dam is few, especially for the case that new cut-off wall built in earth-rock dam. In order to discuss the principal and law of interaction of cut-off wall and earth-rock dam in the reinforcement project, seepage field and stress field coupled numerical model was established by using ABAQUS. The contact between the wall and the dam together with the coupling of the stress and the seepage were taken into account in the model. Through coupling calculation of typical earth-rock dam project, the results show that, the model is feasible to simulate the interaction of cut-off wall and earth-rock dam, and the method can provide reference for design calculations of cut-off wall in reinforcement project of earth-rock dam.

Thermal-Mechanical Coupled Numerical Simulation of Heat Pulp Mould

2011 ◽  
Vol 421 ◽  
pp. 9-13
Author(s):  
De Zhi Yang ◽  
Zhao Yao Zhou ◽  
Wen Jiong Cao ◽  
Yi He
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
High Accuracy ◽  
Design Stage ◽  
Mould Temperature ◽  
Mechanical Pressure ◽  
Numerical Simulation Result ◽  
Hot Temperature ◽  
Coupled Effect

3D thermal-mechanical coupled numerical simulation of heat pulp mould was carried out. The numerical simulation result shows the rising up process of mould temperature. Temperature distribution contours shows the temperature status on the mould. Temperature distribution results provide reliable guarantee to change the mould structure, so that the temperature distribution on surface becomes uniform. Displacement contours show the mould deformation under the coupled effect of hot temperature and mechanical pressure. The displacement value of nodes can offer reference size to scale mould at the design stage. As a result, high accuracy mould will be manufactured, and this will improve the passing rare of product.

Numerical Simulation of Air Distribution in the Series-Type Electrostatic Fabric Filter Precipitator

2011 ◽  
Vol 383-390 ◽  
pp. 6530-6536 ◽  
Author(s):  
Man Yin Hu ◽  
Kai Che ◽  
Jing Zhang ◽  
Xiu Hong Wang
Keyword(s):  
Numerical Simulation ◽  
Structural Model ◽  
Collection Efficiency ◽  
Three Dimensional ◽  
Air Distribution ◽  
Distribution Characteristic ◽  
Numerical Simulation Result ◽  
Fabric Filter ◽  
Simulation Results ◽  
Series Type

For the operation situation of the series-type electrostatic fabric filter precipitator, the deflectors in the inlet of the precipitator whose angle and spacing were changed to improve the air distribution characteristic and collection efficiency were assembled. The three-dimensional structural model of the series-type electrostatic fabric filter precipitator was built and meshed, then carried on the number simulation of air distribution characteristic with FLUENT. The simulation results show that when the deflector spacing is 0.7m and the incremental height is 0.15m the air distribution is more uniform. The numerical simulation result is reasonable and can be used as the reference to optimize the designing of electrostatic fabric filter precipitator.

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