scholarly journals Numerical Analysis of the Dynamic Characteristics of a Balanced Piston Type Relief Valve. 1st Report. Numerical Simulation and Experimental Results.

1997 ◽  
Vol 28 (2) ◽  
pp. 232-238
Author(s):  
Satoru HAYASHI ◽  
Yuji IIZUKA ◽  
Toshiyuki HAYASE ◽  
Ikuro IIMURA
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Dynamic Characteristics ◽  
Experimental Results ◽  
Relief Valve

Simulation of a Free Standing Riser Model and Validation With Experimental Results

2014 ◽  
Author(s):  
Marcio Yamamoto ◽  
Sotaro Masanobu ◽  
Satoru Takano ◽  
Shigeo Kanada ◽  
Tomo Fujiwara ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Previous Experiment ◽  
Numerical Results ◽  
Experimental Results ◽  
Previous Article ◽  
Scale Model ◽  
Analysis Software ◽  
Free Standing ◽  
Reduced Scale

In this article, we present the numerical analysis of a Free Standing Riser. The numerical simulation was carried out using a commercial riser analysis software suit. The numerical model’s dimensions were the same of a 1/70 reduced scale model deployed in a previous experiment. The numerical results were compared with experimental results presented in a previous article [1]. Discussion about the model and limitations of the numerical analysis is included.

scholarly journals Numerical Analysis of the Dynamic Characteristics of a Balanced Piston Type Relief Valve. 2nd Report. Stability of a Relief Valve.

1997 ◽  
Vol 28 (2) ◽  
pp. 239-244
Author(s):  
Satoru HAYASHI ◽  
Yuji IIZUKA ◽  
Ikuro IIMURA ◽  
Toshiyuki HAYASE
Keyword(s):  
Numerical Analysis ◽  
Dynamic Characteristics ◽  
Relief Valve

Numerical Analysis for Dynamic Characteristics of New Launcher with Coupled Rigid and Flexible Motion

2010 ◽  
Vol 34-35 ◽  
pp. 44-49 ◽  
Author(s):  
Ying Ze Wang
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Dynamic Characteristics ◽  
High Performance ◽  
Coupling Effect ◽  
The Other ◽  
Flexible Coupling ◽  
Simulation Based ◽  
Coupling Dynamic ◽  
Coupling Dynamic Model

This paper is concerned with an analysis of the dynamic characteristics of the high performance launcher—rarefaction wave gun(RAVEN) by numerical simulation. Based on its launch mechanism and launch structure, a rigid-flexible coupling dynamic model which considered the coupling effect between the flexible virbation of the launch barrel and the motion behaviors of the other parts of the RAVEN is established via a subsystems method. The actual motion of the projectile and inertial breech during the lauching are described by the interior ballistic equations of the RAVEN. The dynamic characterisitcs of RAVEN is illustrated by the numerical simulation about a small caliber launcher, and the interaction between launch barrel and the other parts is also studied.

Numerical Study of XCP Probe's Fluid Dynamic Characteristics

2011 ◽  
Vol 130-134 ◽  
pp. 1645-1649
Author(s):  
Ning Liu ◽  
Rui Zhang ◽  
Wen Yi Chen ◽  
Man Man Zhang
Keyword(s):  
Numerical Analysis ◽  
Drag Coefficient ◽  
Dynamic Characteristics ◽  
Numerical Study ◽  
Fluid Dynamic ◽  
Steady Motion ◽  
Experimental Results ◽  
Analysis Method ◽  
Test Parameters ◽  
Volume Method

Applied the finite volume method combining two-equations turbulence model,the influence of fluid dynamic characteristics on XCP probe under different factors be studied The fluid dynamic characteristics were researched under different influencing factors, such as falling speed, rotating rate,seawater density,etc. The drag coefficient under the different falling speeds and the limited velocity of submarine steady motion were obtained. Compared with the experimental results, the simulated results agree well with experimental results, the experiments have show the validity and feasibility of the numerical analysis method. These results will provide theory reference for selecting the reasonable rotating rate, analyzing stability and the movement rule of probe in the water, choosing suitable test parameters for XCP probe of different seawaters.

Numerical Analysis of Deformation and Failure of Penetration into Concrete Target by Projectile

2013 ◽  
Vol 804 ◽  
pp. 292-297 ◽  
Author(s):  
Song Gao ◽  
Ya Bin Wang ◽  
Xiu Feng Li
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Shear Failure ◽  
Failure Strain ◽  
Numerical Models ◽  
Experimental Results ◽  
Deformation And Failure ◽  
Material Parameters ◽  
The Military ◽  
Protection Engineering

Penetration is an important topic in the military and protection engineering field. Based on *MAT_PLASTIC_KINEMATIC of LS-DYNA program, this report studies effects of failure strain of the material parameters on structure of penetrating projectile. By establishing a group of numerical models about 45 steel hemispherical projectile penetrating semi-infinite concrete targets, this research aimed at analyzing effects of different failure strain values related to the destruction of the internal bracket structures of this projectile. At the same time, it studied the criterion of failure on finite dynamic program. The numerical results show that the use of failure strain in this model can well simulate damage of internal bracket structures of the projectile. Test was carried on based on this conclusion, which showed that bracket plate is subjected to shear failure in process of penetration, and numerical simulation was consistent with the experimental results.

Flexible chiral metamaterials with dynamically optical activity and high negative refractive index

2015 ◽  
Vol 29 (18) ◽  
pp. 1550087 ◽  
Author(s):  
Furkan Dincer ◽  
Muharrem Karaaslan ◽  
Emin Unal ◽  
Oguzhan Akgol ◽  
Cumali Sabah
Keyword(s):  
Numerical Simulation ◽  
Refractive Index ◽  
Numerical Analysis ◽  
Optical Activity ◽  
Negative Refractive Index ◽  
Experimental Results ◽  
Polarization Converter ◽  
Dynamic Design ◽  
Chiral Metamaterials ◽  
Good Agreement

We demonstrate numerically and experimentally chiral metamaterials (MTMs) based on gammadion-bilayer cross-wires that uniaxially create giant optical activity and tunable circular dichroism as a result of the dynamic design. In addition, the suggested structure gives high negative refractive index due to the large chirality in order to obtain an efficient polarization converter. We also present a numerical analysis in order to show the additional features of the proposed chiral MTM in detail. Therefore, a MTM sensor application of the proposed chiral MTM is introduced and discussed. The presented chiral designs offer a much simpler geometry and more efficient outlines. The experimental results are in a good agreement with the numerical simulation. It can be seen from the results that, the suggested chiral MTM can be used as a polarization converter, sensor, etc. for several frequency regimes.

scholarly journals Assessment of different turbulence models in simulating axisymmetric flow in suddenly expanded nozzles

2018 ◽  
Vol 7 (3.29) ◽  
pp. 243
Author(s):  
Sher Afghan Khan ◽  
Mir Owais Ali ◽  
Miah Mohammed Riyadh ◽  
Zahid Hossen ◽  
Nafis Mahdi Arefin
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Mach Number ◽  
Numerical Simulations ◽  
Axisymmetric Flow ◽  
Turbulence Models ◽  
Experimental Results ◽  
Nozzle Flow ◽  
Axisymmetric Nozzle ◽  
Good Agreement

A numerical simulation was carried out to compare various turbulence models simulating axisymmetric nozzle flow past suddenly expanded ducts. The simulations were done for L/D = 10. The convergent-divergent nozzle has been modeled and simulated using the turbulence models: The Standard k-ε model, The Standard k-ω model and The SST k-ω model. Numerical simulations were done for Mach numbers 1.87, 2.2, and 2.58 and the nozzles were operated for NPRs in the range from 3 to 11. From the numerical analysis it is apparent that for a given Mach number and effect of NPR will result in maximum gain or loss of pressure. Numerical results are in good agreement with the experimental results.  

Analysis of Wind Impacts on the High-Rise Building "Iset Tower"

2013 ◽  
Vol 281 ◽  
pp. 639-644 ◽  
Author(s):  
V.N. Alekhin ◽  
A.A. Antipin ◽  
S.N. Gorodilov
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Qualitative Agreement ◽  
Numerical Results ◽  
Experimental Results ◽  
Wind Loads ◽  
Wind Effects ◽  
High Rise ◽  
High Rise Building

In the paper the wind loads on 52 flore building "Iset Tower" are investigated. Distribution of pressure to the building and velocities are presented. Performed calculations show qualitative agreement with experimental results. According to the results of numerical simulation of wind effects it can be concluded that both aerodynamic experiments and numerical analysis are needed in the design. If there is coincidence of experimental and numerical results then they can be used to calculate the skeleton of the building.

A Way to Analyze Oil Damping Force of Electromagnetic Release with Oil Dashpot

2013 ◽  
Vol 313-314 ◽  
pp. 210-213
Author(s):  
Hui Juan Guo ◽  
Xiu Ping Su ◽  
Xiao Lei Xia
Keyword(s):  
Numerical Analysis ◽  
Flow Field ◽  
Dynamic Characteristics ◽  
Experimental Results ◽  
Theoretical Formula ◽  
Viscous Damper ◽  
Damping Force

t is important for dynamic characteristics of electromagnetic release with oil dashpot to calculate the oil damping force. The formula of the oil damping force is deduced by the theoretical formula of viscous damper or according to the experimental results. Therefore, a way to analyze oil damping force of electromagnetic release with oil dashpot is proposed based on Fluent due to the limitations of the two methods in this paper. The curve which is the speed of the plunger variations of the oil damping force is drawn through the numerical analysis of the flow field and the index of the speed is fitted.

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