Numerical Simulation System for Analyzing Fuel Film Flow in Gasoline Engine

1993 ◽  
Author(s):  
Yasuo Yoshikawa ◽  
Tsutomu Nakada ◽  
Teruyuki Itoh ◽  
Yasuo Takagi ◽  
Terufumi Kawasaki ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Gasoline Engine ◽  
Film Flow ◽  
Simulation System ◽  
Fuel Film

scholarly journals Numerical Simulation System for Analyzing Fuel Film Flow in Intake Port of Gasoline Engine.

1995 ◽  
Vol 61 (590) ◽  
pp. 3432-3439
Author(s):  
Yasuo Yoshikawa ◽  
Tsutomu Nakada ◽  
Teruyuki Itoh ◽  
Yasuo Takagi ◽  
Terufumi Kawasaki ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Gasoline Engine ◽  
Film Flow ◽  
Simulation System ◽  
Intake Port ◽  
Fuel Film

Numerical Simulation of Gas-Liquid Two-Phase Flows on Wetted Walls

2010 ◽  
Author(s):  
Yoshiyuki Iso ◽  
Xi Chen
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Liquid Flow ◽  
Film Flow ◽  
Liquid Flow Rate ◽  
Flow Transition ◽  
Wall Surface ◽  
Two Phase ◽  
Wall Flows ◽  
Rivulet Flow

Gas-liquid two-phase flows on the wall like liquid film flows, which are the so-called wetted wall flows, are observed in many industrial processes such as absorption, desorption, distillation and others. For the optimum design of packed columns widely used in those kind of processes, the accurate predictions of the details on the wetted wall flow behavior in packing elements are important, especially in order to enhance the mass transfer between the gas and liquid and to prevent flooding and channeling of the liquid flow. The present study focused on the effects of the change of liquid flow rate and the wall surface texture treatments on the characteristics of wetted wall flows which have the drastic flow transition between the film flow and rivulet flow. In this paper, the three-dimensional gas-liquid two-phase flow simulation by using the volume of fluid (VOF) model is applied into wetted wall flows. Firstly, as one of new interesting findings in this paper, present results showed that the hysteresis of the flow transition between the film flow and rivulet flow arose against the increasing or decreasing stages of the liquid flow rate. It was supposed that this transition phenomenon depends on the history of flow pattern as the change of curvature of interphase surface which leads to the surface tension. Additionally, the applicability and accuracy of the present numerical simulation were validated by using the existing experimental and theoretical studies with smooth wall surface. Secondary, referring to the texture geometry used in an industrial packing element, the present simulations showed that surface texture treatments added on the wall can improve the prevention of liquid channeling and can increase the wetted area.

A One Dimensional, Time Dependent Inlet / Engine Numerical Simulation for Aircraft Propulsion Systems

1997 ◽  
Author(s):  
Doug Garrard ◽  
Milt Davis ◽  
Steve Wehofer ◽  
Gary Cole
Keyword(s):  
Numerical Simulation ◽  
Gas Turbine ◽  
High Frequency ◽  
Gas Turbine Engine ◽  
Simulation System ◽  
Time Dependent ◽  
Propulsion Systems ◽  
Turbine Engine ◽  
One Dimensional ◽  
Supersonic Inlet

The NASA Lewis Research Center (LeRC) and the Arnold Engineering Development Center (AEDC) have developed a closely coupled computer simulation system that provides a one dimensional, high frequency inlet / engine numerical simulation for aircraft propulsion systems. The simulation system, operating under the LeRC-developed Application Portable Parallel Library (APPL), closely coupled a supersonic inlet with a gas turbine engine. The supersonic inlet was modeled using the Large Perturbation Inlet (LAPIN) computer code, and the gas turbine engine was modeled using the Aerodynamic Turbine Engine Code (ATEC). Both LAPIN and ATEC provide a one dimensional, compressible, time dependent flow solution by solving the one dimensional Euler equations for the conservation of mass, momentum, and energy. Source terms are used to model features such as bleed flows, turbomachinery component characteristics, and inlet subsonic spillage while unstarted. High frequency events, such as compressor surge and inlet unstart, can be simulated with a high degree of fidelity. The simulation system was exercised using a supersonic inlet with sixty percent of the supersonic area contraction occurring internally, and a GE J85-13 turbojet engine.

Simulation Program for Berthing and Mooring of Two Vessels in Consideration of Exact Hydrodynamic Interactions

2005 ◽  
Author(s):  
Shigeki Sakakibara ◽  
Masashi Wakabayashi ◽  
Kiyoshi Shimada ◽  
Hiroshi Yamaguchi
Keyword(s):  
Numerical Simulation ◽  
Crude Oil ◽  
Safety Evaluation ◽  
Simulation System ◽  
Hydrodynamic Interactions ◽  
Simulation Program ◽  
Present System ◽  
Water Tank ◽  
Tank Experiment ◽  
Water Tank Experiment

A numerical simulation system has been developed for safety evaluation of berthing and side-by-side transfer offshore operations between two vessels. Water-tank experiment has been conducted on behaviors of connected two vessels in waves, providing accuracy of the system. Also behavior of two vessels during ship-to-ship transfer offshore operation of crude oil has been simulated by the present system to demonstrate usefulness of the system.

Numerical Simulation and Evaluation of the Oil Film Flow Field in Hydro-Viscous Drive

2013 ◽  
Vol 7 (1) ◽  
pp. 764-771
Author(s):  
Gang Zheng ◽  
Fangwei Xie ◽  
Xialong Li ◽  
Jian Liu ◽  
Jianzhong Cui ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Film Flow ◽  
Oil Film ◽  
Simulation And Evaluation

Research of NOx Emissions Characteristic of Engine Fuelled with M40

2011 ◽  
Vol 382 ◽  
pp. 22-25
Author(s):  
Xin Guang Li ◽  
Bing Yuan Han ◽  
Rong Hai Yang
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Simulation Model ◽  
Compression Ratio ◽  
Gasoline Engine ◽  
Volume Ratio ◽  
Nox Emissions ◽  
Cylinder Pressure ◽  
Variable Parameters ◽  
Vehicle Engine

A numerical simulation model for gasoline engine was established by GT-POWER in order to study the NOx emissions characteristic of vehicle engine fuelled with M40 (the methanol and the gasoline in volume ratio 40∶60) and was validated by Experimental data. Based on the model, the variable parameters study including air-fuel radio, compression radio and ignition advance angle were carried out. The model results showed that the compression radio and the air-fuel radio played an important role during the NOx emissions characteristic. There is a significant improvement of the NOx emissions with the compression ratio increases. The cylinder pressure increased with the improvement of the compression ratio brought out the NOx emissions rise. With the improvement of the air-fuel ratio, NOx emissions increased first and then decreased. A larger ignition advance angle can increase the pressure and the temperature of the cylinder.

scholarly journals Numerical Simulation System for Blood Flow in the Cerebral Artery Using CT Imaging Data

2001 ◽  
Vol 44 (4) ◽  
pp. 982-989 ◽  
Author(s):  
Ryo TORII ◽  
Marie OSHIMA ◽  
Toshio KOBAYASHI ◽  
Kiyoshi TAKAGI
Keyword(s):  
Numerical Simulation ◽  
Blood Flow ◽  
Cerebral Artery ◽  
Ct Imaging ◽  
Simulation System ◽  
Imaging Data
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