CFD SIMULATION OF ORIFICE PULSE TUBE REFRIGERATOR

Banjare Y. P. *, Sahoo R. K., Sarangi S. K.
Department of Mechanical Engineering, NIT Rourkela-769008, Orissa



Abstract A commercial Computational fluid dynamics (CFD) software package Fluent 6.1 is used to model the oscillating flow inside a pulse tube cryocooler. In this paper analysis of orifice type pulse tube refrigerator (OPTR) systems operating under a variety of thermal boundary conditions are modeled at different frequencies. The compressor used ....etc

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Relative roles of CFD and wind tunnel testing in the development of aircraft

Introduction
CFD
CFD is computational technology that enables us to study the dynamics of things that flow.
Using CFD, a computational model that represents a system or device that we want to study is built. Then we apply the fluid flow physics to this virtual prototype, and the software outputs a prediction of the fluid dynamics.

Application
fluid flow, heat transfer , mass , phase change , chemical reaction, mecha ....etc

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hydrogen fuel in internal combustion engine seminar pdf

Abstract

A hydrogen internal combustion engine vehicle (HICEV) is a type of hydrogen vehicle using an internal combustion engine.Hydrogen internal combustion engine vehicles are different from hydrogen fuel cell vehicles (which use electrochemical conversion of hydrogen rather than combustion); the hydrogen internal combustion engine is simply a modified version of the traditional gasoline-powered internal combustion engine. ....etc

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Hello Sir,

I need a Full report and Seminar PPt in CFD for M.E. level presentation.

Thanks,
Sandeep ....etc

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Hydrogen use in internal combustion Engines



OBJECTIVES
At the completion of this module, the technician will understand:
the combustive properties of hydrogen that relate to its use as a combustive fuel
the air/fuel ratio of hydrogen fuel mixtures and how it compares to other fuels
the types of pre-ignition problems encountered in a hydrogen internal combustion engine and their solutions
the type of ignition systems that may be used with hydrogen internal combustion engine ....etc

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Turbulence models in CFD
CFD stands for computational fluid dynamics. A vast field of numerical analysis in the field of fluid s flow phenomena is represented by this topic. Primarily CFD deals with understanding and solving ordinary and partial differential equations and much more than that. turbulence when present in a flow dominates all other flow phenomena.The modeling of turbulence thus greatly improves the quality of numerical simulations.
The main steps in solving a CFD problem is
- geometry and grid generation
-setting-up a ....etc

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1. OBJECTIVES

The combustive properties of hydrogen that relate to its use as a combustive fuel
The air/fuel ratio of hydrogen fuel mixtures and how it compares to other fuels
The types of pre-ignition problems encountered in a hydrogen internal combustion engine and their solutions
The type of ignition systems that may be used with hydrogen internal combustion engines
Crankcase ventilation issues that pertain to hydrogen use in an internal combustion engine
The thermal efficiency of hydrogen internal combustion engin ....etc

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Hi,

I am working on cryogenic combustion of hydrogen for CUS rocket engines.
I have been trying this simulation since last 3 months but either i am not getting proper pressure rise in the chamber which should be around 60 bar or the velocity get too high.
Typical massflowrates for single element injector is
LOX : 200 g/s
GH2 : 34 g/s.
For H2-O2 engines minimum length required is
L* : 0.85 m.(it is characteristic length not length)

For signle element the following dimensions can be used
Throat Dia : 13mm
Contraction ratio : 2.5 t ....etc

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ABSTRACT
Since two-three decades, hydrogen has been identified as a versatile potential fuel competent to the conventional fuel such as gasoline. In order to implement it fully and to develop the combustion based power devices which may supply much higher energy density than others, the understanding of hydrogen air combustion mechanism is very essential. In this seminars, Computational Fluid Dynamics (CFD) based numerical simulations have been performed to study the combustion of non-premixed hydrogen-a ....etc

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ABSTRACT
The overall goal of the work presented in this thesis is to extend the physical understanding of the external aerodynamics associated with the rotating case of Hovering Rotor using Computational Fluid Dynamics (CFD) technique.
Rotating blades encounter tip vortices coming from preceding blades, which results in Blade Vortex Interaction(BVI) responsible for producing dynamic effects. Understanding the complex flow field due to this dynamic effects produced by wakes is therefore very important for the prediction of effects such as blad ....etc

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