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Friday, May 8, 2020 | History

3 edition of Modeling on nonacoustic combustion instability in simulations of hybrid motor tests found in the catalog.

Modeling on nonacoustic combustion instability in simulations of hybrid motor tests

M. Rocker

Modeling on nonacoustic combustion instability in simulations of hybrid motor tests

by M. Rocker

  • 156 Want to read
  • 6 Currently reading

Published by National Aeronautics and Space Administration, Marshall Space Flight Center, Available from NASA Center for AeroSpace Information in Marshall Space Flight Center, Ala, Hanover, Md .
Written in English

    Subjects:
  • Hybrid propellant rockets.,
  • Rocket engines -- Combustion.,
  • Space vehicles -- Propulsion systems -- Mathematical models.

  • Edition Notes

    StatementM. Rocker.
    GenreMathematical models.
    SeriesNASA/TP -- 2000-209905, NASA technical paper -- 2000-209905.
    ContributionsGeorge C. Marshall Space Flight Center., United States. National Aeronautics and Space Administration.
    The Physical Object
    Paginationvii, 51 p. :
    Number of Pages51
    ID Numbers
    Open LibraryOL18834110M

    Combustion dynamics are controlled by the coupling between heat addition and gas dynamic modes, and their direct measurement and comparisons with prediction are key to improving computational tools, as well as our fundamental understanding of the problem. This paper demonstrates several methods for characterizing and comparing dynamic combustion response from experiment and by: the existing theoretical models in diesel engine combustion. The model has then been evaluated in a simulation environment using Matlab/Simulink. The model that has been implemented is a multi-zone type and is able to handle multiple injections. The model that this thesis results in can in a good way predict both pressure and torque generated.

    vestigations will largely depend on the reliability of the combustion models used. While there is a large scientific community concerned with Computational Fluid Dynamics and the improvement of turbulence models, the know-how in combustion modeling seems to be restricted to specialists. Combustion instability; Motor internal ballistics; Static firing tests of a hybrid rocket motor using liquid nitrous oxide (N 2 O) as the oxidizer and high-density polyethylene we undertake a concise review of several milestone developments in classical regression rate models of hybrid rocket motors. After a brief description of the.

    Combustion-specific topics of chemistry and fluid mechanics are considered and tools described for the simulation of combustion processes. This edition is completely restructured. Mathematical Formulae and derivations as well as the space-consuming reaction mechanisms have Cited by: Combustion is an old technology, which at present provides about 90% of our worldwide energy support. Combustion research in the past used fluid mechanics with global heat release by chemical reactions described with thermodynamics, assuming infinitely fast reactions. This approach was useful for stationary combustion processes, but it is not sufficient for transient processes like ignition Reviews: 2.


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Modeling on nonacoustic combustion instability in simulations of hybrid motor tests by M. Rocker Download PDF EPUB FB2

MODELING OF NONACOUSTIC COMBUSTION INSTABILITY IN SIMULATIONS OF HYBRID MOTOR TESTS 1. INTRODUCTION Nonacoustic combustion instabilities are high-amplitude chamber pressure oscillations that have frequencies too low to be characterized as acoustic in nature.

In hybrid motors, combustion instability of. A transient model of a hybrid motor was formulated to study the cause and elimination of nonacoustic combustion instability. The transient model was used to simulate four key tests out of a series of seventeen hybrid motor tests conducted by Thiokol, Rocketdyne, and Martin Marietta at NASA Marshall Space Flight Center (MSFC).

These tests were performed under the Hybrid Propulsion Technology Author: M. Rocker. A transient model of a hybrid motor was formulated to study the cause and elimination of nonacoustic combustion instability.

The transient model was used to simulate four key tests out of a series of seventeen hybrid motor tests conducted by Thiokol, Rocketdyne, and Martin Marietta at NASA Marshall Space Flight Center (MSFC).

These tests were performed under the Hybrid Propulsion Technology. A transient model of a hybrid motor was formulated to study the cause and elimination of nonacoustic combustion instability. The transient model was used to. A transient model of a hybrid motor was formulated to study the cause and elimination of non-acoustic combustion instability.

The transient model was used to simulate four key tests out of a series of seventeen hybrid motor tests conducted by Thiokol, Rocketdyne and Martin Marietta at NASA/Marshall Space Flight Center (NASA/MSFC).Author: Marvin Rocker.

A transient model of a hybrid motor was formulated to study the cause and elimination of non-acoustic combustion instability. The transient model was used to simulate four key tests out of a series of seventeen hybrid motor tests conducted by Thiokol, Rocketdyne and Martin Marietta at NASA/Marshall Space Flight Center (NASA/MSFC).

A transient model of a hybrid motor was formulated to study the cause and elimination of nonacoustic combustion instability. The transient model was used to simulate four key tests.

The motor design and operation are contingent on the type of designated mission; therefore, it is useful to couple design and trajectory optimization.

This approach is especially needed for hybrid rockets in which a unique combustion process links thrust and specific by: 3. A hybrid rocket motor with vortex generating mixing enhancer is proposed to increase the overall mixing and combustion efficiency, which also results in the allowance of reducing the chamber port.

Computer Simulation of an Internal Combustion Engine Supervisor in UMBC: Dr. Christian von Kerczek Add a new combustion model, replacing the existing one used in the initial program.

The The simulation is based on the standard configuration of a reciprocating piston in a cylinder closed. Abstract.

Hybrid rocket combustion has a manifestation of stable response to the perturbations compared to solid propellant combustion. Recently, it has revealed that the low frequency combustion instability about 10 Hz was occurred mainly due to thermal inertia of solid by: 6.

POLITECNICO DI MILANO MATHEMATICS DEPARTMENT "F. BRIOSCHI" DOCTORAL PROGRAMME IN MATHEMATICAL MODELS AND METHODS IN ENGINEERING NUMERICAL MODELING AND SIMULATIONS OF COMBUSTION PROCESSES IN HYBRID ROCKET ENGINES Doctoral Dissertation of: Alessandro Mazzetti Supervisor: Prof. Barbante. Hydrodynamic instability modes can also differ as well as the combustion regimes, which can require very different simulation models.

The integration of chambers in real engines implies that compressor and turbine impedances control instabilities directly so that the determination of the impedances of turbomachinery elements becomes a key by: Solid Rocket Motor Combustion Instability Modeling in COMSOL Multiphysics Sean R.

Fischbach1 1Qualis Corp. / Jacobs ESSSA Group / NASA Marshall Spce Flight Center *MSFC Huntsville /, [email protected] Abstract: Combustion instability modeling of Solid Rocket Motors (SRM) remains a topic of active by: 1.

A combustion model was developed to simulate engine combustion with multi-component fuels using the present MultiChem mechanism, and the model was applied to simulate HCCI and DI engine by: model-based control methodology for instability suppression.

Several proof-of-concept demonstrations have been carried out in scaled rigs and fields tests. The Reality of Combustion Instability Combustion instability has been a serious problem for gas turbine manufacturers.

The Wall Street Journal (Febru ) reported the following issues:File Size: KB. The numerical simulation of combustion processes in internal combustion engines, including also the formation of pollutants, has become increasingly important in the recent years, and today the simulation of those processes has already become an indispensable tool when - veloping new combustion.

3D-Combustion Simulation: Potentials, Modeling and Application Issues Dr. Rüdiger Steiner 10th Diesel Engine Emissions Reduction Conference August 29 – Septem Coronado, California.

This process identifies a combustion-instability region and attempts to either eliminate this region or moved the operating region away from it. This is a very costly iterative process. For example, the numerous tests required to develop rocket engines [4] are largely in part due to the need to eliminate or reduce the impact of thermoacoustic.

"The topic of this book is modeling and control of internal combustion engines for automotive applications. In summary, this book is an essential text for anyone interested in engine control design. It seems appropriate for a graduate-level course in particular, for students with some control background.

Self-excited combustion instabilities have been studied using a combination of two- and three-dimensional computational fluid dynamics (CFD) simulations. This work was undertaken to assess the ability of CFD simulations to generate the high-amplitude resonant combustion dynamics without external forcing or a combustion response by: Internal Combustion Engine Modeling Dr.

Alan Kéromnès University of Burgundy ISAT (Superior Institute for Automotive and Transports) 2 Lecture layout • Very simple global model • 0D thermodynamic model for internal combustion engine – Principle – 0D Model – Sub-models.Approaches for Comparing Numerical Simulation of Combustion Instability and Flame Imaging paper demonstrates several methods for characterizing and comparing dynamic combustion response from experiment and simulation.

A model rocket combustor that exhibits self-excited instabilities is used for the study. “ Combustion Instability Cited by: