Last edited by Malashicage

Tuesday, May 12, 2020 | History

3 edition of **Turbulence characteristics of an axisymmetric reacting flow** found in the catalog.

Turbulence characteristics of an axisymmetric reacting flow

- 348 Want to read
- 17 Currently reading

Published
**1987**
by National Aeronautics and Space Administration in [Washington, DC
.

Written in English

- Combustion -- Research.,
- Turbulence -- Research.

**Edition Notes**

Statement | Richard D. Gould, Warren H. Stevenson and H. Doyle Thompson. |

Series | NASA-CR -- 180697., NASA contractor report -- NASA CR-180697. |

Contributions | Stevenson, W. H., Thompson, H. Doyle., United States. National Aeronautics and Space Administration. |

The Physical Object | |
---|---|

Format | Microform |

Pagination | 1 v. |

ID Numbers | |

Open Library | OL15282263M |

Simulation and modeling of turbulence subjected to a period of axisymmetric contraction or expansion Christopher J. Zusi and J. Blair Perot Citation: Physics of Fluids (present) 26, (); doi: / Stokes Stream Function Up: Axisymmetric Incompressible Inviscid Flow Previous: Introduction Axisymmetric Flow A flow pattern is said to be axisymmetric when it is identical in every plane that passes through a certain straight-line. The straight-line in question is referred to as the symmetry axis.

Axisymmetric Vortex Simulations with Various Turbulence Models number. One possible compromise for a numerical simulations is to model only the effect of turbulent mixing on a predicted ensemble-mean flow, using a so-called “turbulence parameterization”. Another compromise is to constrain the solution to be axisymmetric, which. Reacting Nozzle Flow Coupled Implicit, Axisymmetric Steady, SST K-Omega turbulence Detailed chemistry: 11 species DARS-CFD Approximation options: – In-situ Adaptive Tabulation • Populates source terms as the simulation progresses for subsequent look-up • Speeds computational time once the table is populated – Equilibrium Time-Scale.

iii This thesis is based on the following papers: Paper 1 “On the eﬀect of ﬁnite Reynolds number and initial conditions on the axisymmet-ric wake”, P. B. V. Johansson and W. K. Size: 7MB. In fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic, stochastic property changes. This includes low momentum diffusion, high momentum convection, and rapid.

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Get this from a library. Turbulence characteristics of an axisymmetric reacting flow. [Richard D Gould; Warren H Stevenson; Howard Doyle Thompson; United.

Get this from a library. Turbulence characteristics of an axisymmetric reacting flow. [Richard D Gould; Warren H Stevenson; Howard Doyle Thompson; United States.

National Aeronautics and Space Administration. Scientific and Technical Information Division.]. turbulence closure coefficients cr fl turbulence closure coefficients,- - T viscous stress tensor cp cylindrical or azimuthal coordinate w vorticity or pseudovortici ty n dissipation rate quantity, pw 9 divergence operator Subscripts a a = 0 plane flow, = 1 axisymmetric flow t denotes turbulent quantity i denotes ith species viii.

Measurements of turbulence characteristics in rectangular ducts 8 Measurements of turbulence characteristics in trapezoidal ducts 10 Measurements of turbulence characteristics in circular axisymmetric diffuser 1 1 Measurements by hot-wire anemometer 12 3. THEORETICAL BACKGROUND ON MEASURED PARAMETERS Turbulent jet characteristics are explored for an axisymmetic and serrated nozzle.

• Numerical solutions are performed on grids from 7 M to 20 M nodes. • Validation against a variety of experimental data is made for the round jet. • Comparisons of round and chevron jet are made in terms of mean velocities and higher order turbulent Cited by: Engineering Turbulence Modelling and Experiments 6 The fountain flow created by two underexpanded axisymmetric, turbulent jets impinging on a ground plane was studied through the use of laser-based experimental techniques.

Velocity and turbulence data were acquired in the jet and fountain flow regions using laser doppler velocimetry and. Particle imaging velocimetry measurements were carried out in axisymmetric turbulent air jet for Reynolds number range covering transition (Re: to ) and turbulent flow (Re: to ow characteristics behind a backward-facing step and the design of a new axisymmetric model for their study Jagannath Rajasekaran Master of Applied Science Graduate Department of Aerospace Engineering University of Toronto An extensive review was made to study the wake characteristics of a backward-facing by: Turbulent jet large eddy simulations (LES) are performed at Mach and Reynolds number around.

Implicit large-eddy simulation (ILES) is employed, namely omitting explicit subgrid scale : Hao Xia. This is a graduate text on turbulent flows, an important topic in fluid dynamics.

It is up-to-date, comprehensive, designed for teaching, and is based on a course taught by the author at Cornell University for a number of : Stephen B.

Pope. This paper describes experimental and numerical investigations concerning the turbulent flow through axisymmetric expansions having different diffuser half-angles (6 deg Cited by: 2. A semiempirical model of turbulence in a uniform shear flow is constructed which is based on the equations for the second two-point moments assuming the axial symmetry of the statistical characteristics of turbulence.

Use is made of the theory of axisymmetric turbulence [2].Cited by: 2. Axisymmetric Confined Turbulent Jet Directed Towards the Liquid j Surface From Below an axisymmetric turbulent jet.

The flow is steady- state and incompressible. The liquid-vapor inter- of the liquid-side turbulence characteristics v a a and 11 by solving the app;opriate-governing equa-Author: Mohammad M. Hasan. Assessment of turbulence model performance for transonic flow over an axisymmetric bump - Volume Issue - R.

Hasan, J. McGuirkCited by: In axisymmetric flow it's based on a 2d computational domain (assuming you selected the 2D axisymmetric solver) where the axis of rotation is coincident with the x-axis.

Then, fluent solves the flow in cylindrical coordinates (r=y, theta=all angles, z=x). Instead, you can use the 3D solver, and set periodic boundary conditions on a wedge.

Each vortex breaks up due to these instabilities, as discovered by Schneider () and Yule (). Figure Vortex pairing in a turbulent jet shear layer. From Freymuth () Streamwise vortices play crucial role in the development of three dimensional turbulence flow beyond the potential core of the axisymmetric turbulent jet.

A new turbulence model for the axisymmetric plume Anupam Dewan,* Jaywant H. Arakeri, and J. Srinivasan Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India A new turbulence model has been proposed for the axisymmetric plume.

In this model the equations for the. @article{osti_, title = {Computation of turbulent reacting flow in a solid-propellant ducted rocket}, author = {Chao, Y and Chou, W and Liu, S}, abstractNote = {A mathematical model for computation of turbulent reacting flows is developed under general curvilinear coordinate systems.

An adaptive, streamline grid system is generated to deal with the complex flow structures in a multiple. The 40 papers cover jets, sub-grid models and homogeneous turbulence, separated flows and transition, thermal and compressible flows, wall flows and channel flows, complex flows, reacting flows, combustion, and flow past a square cylinder as a test case for large-eddy simulation 2.

The turbulence characteristics of an axisymmetric wake shed by a very slender body at Mach 3 have been measured with the hot‐wire anemometer. The region covered began at transition, located immediately downstream of the model, and ended about virtual (momentum) wake diameters downstream.

By using computer‐aided corrections to the anemometer frequency response, maps of Cited by:. I've tried to set up a simple axisymmetric flow in 2D (fully developed pipe flow) with the main flow in the x-direction.

The first question is how to handle the x-axis: I guess it is not possible to create a grid where the 1st cell coincides with the axis (i.e. r=0) itself as this would demand a cell type with only 5 sides instead of 6.This monograph details recent achievements in turbulence theory, experiments and computations relevant to heat and mass transfer.

Containing over 90 papers presented at the International Syposium on Turbulence, Heat and Mass Transfer, held in Lisbon, Portugal inthis book covers topics from turbulence structure to computation of complex flows.A vertical axisymmetric turbulent jet emitted from a fully developed pipe flow, weakly confined in an air coflow, is investigated.

Apart from the constant density case (air/air), two situations with variable density are treated with a density ratio varying from [He/air] to [CO 2 /air], with the momentum flux M j maintained by: