Numerical Simulations Of High Speed Turbulent Jets In Crossflow
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Numerical Simulations Of High Speed Turbulent Jets In Crossflow
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Author : Xiaochuan Chai
language : en
Publisher:
Release Date : 2012
Numerical Simulations Of High Speed Turbulent Jets In Crossflow written by Xiaochuan Chai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Detailed Numerical Simulation Of Liquid Jet In Crossflow Atomization With High Density Ratios
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Author : Sina Ghods
language : en
Publisher:
Release Date : 2013
Detailed Numerical Simulation Of Liquid Jet In Crossflow Atomization With High Density Ratios written by Sina Ghods and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Atomization categories.
The atomization of a liquid jet by a high speed cross-flowing gas has many applications such as gas turbines and augmentors. The mechanisms by which the liquid jet initially breaks up, however, are not well understood. Experimental studies suggest the dependence of spray properties on operating conditions and nozzle geometry. Detailed numerical simulations can offer better understanding of the underlying physical mechanisms that lead to the breakup of the injected liquid jet. In this work, detailed numerical simulation results of turbulent liquid jets injected into turbulent gaseous cross flows for different density ratios is presented. A finite volume, balanced force fractional step flow solver to solve the Navier-Stokes equations is employed and coupled to a Refined Level Set Grid method to follow the phase interface. To enable the simulation of atomization of high density ratio fluids, we ensure discrete consistency between the solution of the conservative momentum equation and the level set based continuity equation by employing the Consistent Rescaled Momentum Transport (CRMT) method. The impact of different inflow jet boundary conditions on different jet properties including jet penetration is analyzed and results are compared to those obtained experimentally by Brown & McDonell(2006). In addition, instability analysis is performed to find the most dominant insta- bility mechanism that causes the liquid jet to breakup. Linear instability analysis is achieved using linear theories for Rayleigh-Taylor and Kelvin- Helmholtz instabilities and non-linear analysis is performed using our flow solver with different inflow jet boundary conditions.
Numerical Simulation Of The Turbulence Structure Of High Speed Jets
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Author : K. Viswanathan
language : en
Publisher:
Release Date : 1994
Numerical Simulation Of The Turbulence Structure Of High Speed Jets written by K. Viswanathan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Direct Numerical Simulations And Modeling Of Jets In Crossflow
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Author : Suman Muppidi
language : en
Publisher:
Release Date : 2006
Direct Numerical Simulations And Modeling Of Jets In Crossflow written by Suman Muppidi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Numerical Simulations Of Multiphase Turbulent Jets
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Author : Thomas Gabriel Almeida
language : en
Publisher:
Release Date : 2004
Numerical Simulations Of Multiphase Turbulent Jets written by Thomas Gabriel Almeida and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Fluid dynamics categories.
Numerical Simulation Of Turbulent Jets With Rectangular Cross Section
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Author : Robert V. Wilson
language : en
Publisher:
Release Date : 1997
Numerical Simulation Of Turbulent Jets With Rectangular Cross Section written by Robert V. Wilson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Three-dimensional turbulent jets with rectangular cross-section are simulated with a finite-difference numerical method. The full Navier-Stokes equations are solved at low Reynolds numbers, whereas at the high Reynolds numbers filtered forms of the equations are solved along with a subgrid scale model to approximate effects of the unresolved scales. A 2-N storage, third-order Runge-Kutta scheme is used for temporal discretization and a fourth-order compact scheme is used for spatial discretization. Computations are performed for different inlet conditions which represent different types of jet forcing. The phenomenon of axis-switching is observed, and it is confirmed that this is based on self-induction of the vorticity field. Budgets of the mean streamwise velocity show that convection is balanced by gradients of the Reynolds stresses and the pressure.
Numerical Simulation Of Turbulent Jets With Rectangular Cross Section
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Author : Robert V. Wilson
language : en
Publisher:
Release Date : 1997
Numerical Simulation Of Turbulent Jets With Rectangular Cross Section written by Robert V. Wilson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Navier-Stokes equations categories.
Jet In Supersonic Crossflow
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Author : Mingbo Sun
language : en
Publisher: Springer
Release Date : 2019-02-18
Jet In Supersonic Crossflow written by Mingbo Sun and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-18 with Technology & Engineering categories.
Based on research into jets in supersonic crossflow carried out by the authors’ team over the past 15 years, this book summarizes and presents many cutting-edge findings and analyses on this subject. It tackles the complicated mixing process of gas jets and atomization process of liquid jets in supersonic crossflow, and studies their physical mechanisms. Advanced experimental and numerical techniques are applied to further readers’ understanding of atomization, mixing, and combustion of fuel jets in supersonic crossflow, which can promote superior fuel injection design in scramjet engines. The book offers a valuable reference guide for all researchers and engineers working on the design of scramjet engines, and will also benefit graduate students majoring in aeronautical and aerospace engineering.
Numerical Simulations Of A Developing Turbulent Wall Jet Along A Thermally Active Surface
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Author : Qingtian Wang
language : en
Publisher:
Release Date : 1999
Numerical Simulations Of A Developing Turbulent Wall Jet Along A Thermally Active Surface written by Qingtian Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Air ducts categories.
Simulation Of Turbulent Flows With And Without Combustion With Emphasis On The Impact Of Coherent Structures On The Turbulent Mixing
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Author : Cunha Galeazzo, Flavio Cesar
language : en
Publisher: KIT Scientific Publishing
Release Date : 2016-10-14
Simulation Of Turbulent Flows With And Without Combustion With Emphasis On The Impact Of Coherent Structures On The Turbulent Mixing written by Cunha Galeazzo, Flavio Cesar and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-14 with Chemical engineering categories.
The analysis of turbulent mixing in complex turbulent flows is a challenging task. The effective mixing of entrained fluids to a molecular level is a vital part of the dynamics of turbulent flows, especially when combustion is involved. The work has shown the limitations of the steady-state simulations and acknowledged the need of applying high-fidelity unsteady methods for the calculation of flows with pronounced unsteadiness promoted by large-scale coherent structures or other sources.
