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Numerical Investigation Of Hydrogen Under Expanded Jet Flow Considering Viscous Effects
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Book Synopsis Numerical Investigation Of Hydrogen Under-Expanded Jet Flow Considering Viscous Effects by : Farbid Vakilimoghaddam
Download or read book Numerical Investigation Of Hydrogen Under-Expanded Jet Flow Considering Viscous Effects written by Farbid Vakilimoghaddam and published by . This book was released on 2017 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen is the simplest and the most plentiful element in the universe. It is the cleanest burning fuel with water as the only by-product of the combustion process. Nevertheless, the low energy density per volume of hydrogen requires highly pressurized tanks to store a reasonable amount of energy. Highly pressurized storage tanks increase the risk of tank valve failure and hydrogen release into atmosphere.In this study, two approaches are developed to investigate sudden hydrogen release. In the first approach, an analytical method is used to analyze the time histories of stagnation properties inside the chamber and sonic properties at the throat. In the second approach, computational fluid dynamics (CFD) analysis is conducted using Ansys CFX solver. Unsteady 3D Navier-Stokes equations along with an additional transport equation are the governing equations of the flow. This CFD analysis is second order accurate in time and space. The SST k-} turbulence model is employed to study the turbulent properties of the flow. Peng-Robinson real gas EOS is used for the accurate prediction of the hydrogen properties. A fully structured high quality mesh is constructed with.
Book Synopsis Numerical Investigation of Supersonic Reacting Hydrogen Jets in a Hot Air Co-flow by : Daniel Gaffie
Download or read book Numerical Investigation of Supersonic Reacting Hydrogen Jets in a Hot Air Co-flow written by Daniel Gaffie and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of High Pressure Hydrogen Releases Into Air Through Varying Orifice Geometries by : Nasim Shishehgaran
Download or read book Numerical Simulation of High Pressure Hydrogen Releases Into Air Through Varying Orifice Geometries written by Nasim Shishehgaran and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large Eddy Simulation of Hydrogen Sonic Jet by : Mohammadamin Afroosheh
Download or read book Large Eddy Simulation of Hydrogen Sonic Jet written by Mohammadamin Afroosheh and published by . This book was released on 2014 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is investigating the turbulence behavior of highly under expanded hydrogen jet based on a 3D Navier-Stokes parallel solver and an extra transport equation for the hydrogen concentration. The solver uses an implicit conservative scheme on unstructured tetrahedral. The discretization exploits finite volumes and finite element with a second order of accurate flux calculation and time discretization. This work presents the extension of the code to simulate hydrogen jets based on Large Eddy Simulation (LES) model for turbulence while considering the real gas behavior. The developed code is equipped with a dynamic wiggle detector to reduce the contribution of the upwinding part in the flux calculation because upwind methodology adds undesired artificial viscosity to the solution. For validation, the developed code is used to simulate a subsonic hydrogen jet. Considering similar studies among literature, good agreement is observed. Afterward, this tool is employed to numerically investigate a 70 MPa hydrogen jet release into ambient air. The turbulence effects in the principal and lateral jet direction are studied. During these simulations, the performance and stability of the developed numerical tool for high pressure ratio is reported.
Book Synopsis Experimental and Numerical Investigation of Hydrogen Combustion in a Supersonic Flow by : Corin Segal
Download or read book Experimental and Numerical Investigation of Hydrogen Combustion in a Supersonic Flow written by Corin Segal and published by . This book was released on 1991 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Hydrogen Strut Injections Into Supersonic Air Flows by : P. Gerlinger
Download or read book Numerical Investigation of Hydrogen Strut Injections Into Supersonic Air Flows written by P. Gerlinger and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of a High Pressure Hydrogen Jet of 82MPa with Adaptive Mesh Refinement: Concentration and Velocity Distributions by :
Download or read book Numerical Investigation of a High Pressure Hydrogen Jet of 82MPa with Adaptive Mesh Refinement: Concentration and Velocity Distributions written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Study of Hydrogen Jet Flames in Supersonic Flows by : Ji-Ho Kim
Download or read book Numerical Study of Hydrogen Jet Flames in Supersonic Flows written by Ji-Ho Kim and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Hydrogen Sonic Jet With Real Gas Model by : Reza Khaksarfard
Download or read book Numerical Investigation of Hydrogen Sonic Jet With Real Gas Model written by Reza Khaksarfard and published by . This book was released on 2011 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Nozzle Aspect Ratio Effects on Underexpanded Hydrogen Jet Release Characteristics by :
Download or read book Experimental Investigation of Nozzle Aspect Ratio Effects on Underexpanded Hydrogen Jet Release Characteristics written by and published by . This book was released on 2013 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of the Ozone Addition Effect on Ignition Characteristics of Hydrogen-jet Fuel in a Constant-volume Combustion Chamber by :
Download or read book Experimental and Numerical Investigation of the Ozone Addition Effect on Ignition Characteristics of Hydrogen-jet Fuel in a Constant-volume Combustion Chamber written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Hydrogen Combustion in Boundary Layer for Turbulent Skin Friction Reduction of Hypersonic Applications by : Ekin Ecem Baspinar
Download or read book Numerical Investigation of Hydrogen Combustion in Boundary Layer for Turbulent Skin Friction Reduction of Hypersonic Applications written by Ekin Ecem Baspinar and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the hypersonic flight regime, the flow is turbulent by its nature. Skin friction is greatly increased due to additional turbulent stresses caused by eddy structures in the flow. While skin friction drag accounts for the majority of total drag loss of hypersonic vehicles, reducing skin friction becomes crucial to improve performance. Research shows that combustion of low-density gases in the boundary layer results in reduction of skin friction drag. An analysis of predicting the reduction of skin friction coefficient by combustion of H2 is carried out by Stalker. This analysis is based on the semi-empirical formula of Van Driest for predicting cf for a turbulent flat plate. This thesis aims to validate the results of both analyzes by CFD simulations and provide numerical data for combustion of turbulent boundary layer. A Matlab code is written for both Van Driests theory and Stalkers analysis to solve the equations for the flow conditions input. The analytical data is extracted for Ma=5. ANSYS Fluent simulations are performed with the same flow conditions as given in the code. The analytical data is compared with the numerical results and validated. Different turbulence models are compared for their near-wall modelling performance. Different injection conditions for H2 and the effect on the skin friction reduction efficiency is investigated.*****In the hypersonic flight regime, the flow is turbulent by its nature. Skin friction is greatly increased due to additional turbulent stresses caused by eddy structures in the flow. While skin friction drag accounts for the majority of total drag loss of hypersonic vehicles, reducing skin friction becomes crucial to improve performance. Research shows that combustion of low-density gases in the boundary layer results in reduction of skin friction drag. An analysis of predicting the reduction of skin friction coefficient by combustion of H2 is carried out by Stalker. This analysis is based on the semi-empirical formula of Va
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Book Synopsis Numerical Investigation of the Supersonic Flow Over a Rearward Facing Step with Transverse Hydrogen Injection by : Steven Mark Sahm
Download or read book Numerical Investigation of the Supersonic Flow Over a Rearward Facing Step with Transverse Hydrogen Injection written by Steven Mark Sahm and published by . This book was released on 1985 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Numerical Study on Mixing and Combustion of Injecting Hydrogen Jet in a Supersonic Air Flow by : Masahiro Takahashi
Download or read book Numerical Study on Mixing and Combustion of Injecting Hydrogen Jet in a Supersonic Air Flow written by Masahiro Takahashi and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
