Direct Numerical Simulation of Acoustic-Flow Interactions in Solid Rocket Motors PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Direct Numerical Simulation of Acoustic-Flow Interactions in Solid Rocket Motors PDF full book. Access full book title Direct Numerical Simulation of Acoustic-Flow Interactions in Solid Rocket Motors by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
Get Book Here
Book Description
A summary of research on our studies of acoustic-mean flow interactions in solid rocket motors is presented in this Final Technical Report. Two-dimensional, time-dependent solutions of the compressible Navier-Stokes equations have been obtained in a rectangular duct under conditions of monochromatic acoustic forcing. The existence of a cut-off frequency, the appearance of oblique waves, and the behavior at resonance compare well with previously published analytical predictions. The thickness of the acoustic boundary layer and its response to imposed disturbances are also in good agreement with theory. The code is being modified to include nonpremixed combustion, which will allow studying acoustic interactions with a chemically reactive mean flow. (MM).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
Get Book Here
Book Description
A summary of research on our studies of acoustic-mean flow interactions in solid rocket motors is presented in this Final Technical Report. Two-dimensional, time-dependent solutions of the compressible Navier-Stokes equations have been obtained in a rectangular duct under conditions of monochromatic acoustic forcing. The existence of a cut-off frequency, the appearance of oblique waves, and the behavior at resonance compare well with previously published analytical predictions. The thickness of the acoustic boundary layer and its response to imposed disturbances are also in good agreement with theory. The code is being modified to include nonpremixed combustion, which will allow studying acoustic interactions with a chemically reactive mean flow. (MM).
Author: David R. Kassoy
Publisher:
ISBN:
Category :
Languages : en
Pages : 151
Get Book Here
Book Description
A new formulation for chamber flow dynamics in a model of solid rocket engine shows that vorticity generation and convection are prominent physical features of the flow field. Analytical and fully computational methods are employed. to describe a basically inviscid interaction between acoustic disturbances arising from specified boundary disturbances and a sidewall injected flow field which simulates propellant burning. The mathematical model, based on the Navier Stokes equations, is developed in terms of an initial value problem in order to describe the complete, natural chamber flow evolution arising from boundary driven disturbances. The approach is analogous to a direct numerical simulation, although contemporary perturbation methods are employed to extract specific spatial and temporal scales from the equations and boundary conditions. The results show that large unsteady vorticity is created at the injected surface (sidewall) and convects into the cylinder with the radial component of the injection flow velocity.
Author: F. Vuillot
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: J. D. Baum
Publisher:
ISBN:
Category :
Languages : en
Pages : 61
Get Book Here
Book Description
The objective of this research work was directed at gaining understanding of the physical mechanisms by which energy is exchanged between the mean and acoustic flow fields in resonant combustion chambers (in particular, solid rocket motors). These processes may alter the balance between sources and sinks of oscillatory energy in the combustor significantly and thus are critical to our ability to predict the stability characteristics of proposed motor designs. The present report is concentrated on the description and analysis of the computational results obtained to date in the study of acoustic refraction and flow turning phenomena. The time-dependent compressible Navier Stokes equations were solved utilizing an implicit, non-iterative Linearized Block Implicit scheme. In the first study acoustic wave propagation in a tube with a coexisting sheared mean flow was investigated. To help discriminate between acoustic energy loss due to artificial numerical dissipation and energy loss due to physical processes a second study was conducted in which acoustic wave propagation in a tube with no mean flow was investigated. The third study investigated acoustic wave propagation in a tube with a coexisting mean flow, where the mean flow is injected into the tube through its lateral boundary.
Author: P. Venugopal
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Bernard Geurts
Publisher: Springer Science & Business Media
ISBN: 9401712638
Category : Technology & Engineering
Languages : en
Pages : 543
Get Book Here
Book Description
This volume contains the proceedings of the 2001 DLES4 workshop. It describes and discusses state-of-the-art modeling and simulation approaches for complex flows. Fundamental turbulence and modeling issues but also elements from modern numerical analysis are at the heart of this field of interest.
Author: Zhen-Guo Wang
Publisher: John Wiley & Sons
ISBN: 1118890027
Category : Technology & Engineering
Languages : en
Pages : 392
Get Book Here
Book Description
This book concentrates on modeling and numerical simulations of combustion in liquid rocket engines, covering liquid propellant atomization, evaporation of liquid droplets, turbulent flows, turbulent combustion, heat transfer, and combustion instability. It presents some state of the art models and numerical methodologies in this area. The book can be categorized into two parts. Part 1 describes the modeling for each subtopic of the combustion process in the liquid rocket engines. Part 2 presents detailed numerical methodology and several representative applications in simulations of rocket engine combustion.
Author: American Institute of Aeronautics and Astronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 960
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 920
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 19
Get Book Here
Book Description
This paper reviews and summarizes recent work on flow-structural interaction in solid rocket motors. This interaction between bore flow and propellant grain is important because it can lead to rocket motor failure. In the first part of the paper, an idealized model of the failure mechanism is developed to illustrate in simple terms how such an event can occur. In the second part of the paper, recently published numerical modeling work, which models flow-structural interactions in some detail, is summarized. The static test failure of the Titan solid rocket motor upgrade (SRMU) that occurred on 1 April, 1991, demonstrated the importance of flow-structural modeling in the design of large, solid rocket motors. The model developed in this paper was applied to the Titan SRMU failure to assess its validity and was found to produce reasonable and conservative predictions of the failure. There were two consequences of the failure of the Titan SRMU. The first was an extensive effort to model and understand the failure so that a recurrence could be prevented. Subsequent to this, other large motors were analyzed to make sure there was no chance of a grain failure. Some of these analyses were done before the motors were flown, as in the case of the Ariane V, and some were carried out for motors already flying successfully, such as the Titan 7-segment solid rocket motor. The results of these efforts also are provided. (12 figures, 17 refs.).
