Nonlinear wave instabilities of liquid propellants

K. Y. Lee, W. S. Yoon

Research output: Contribution to conferencePaper

Abstract

This paper is concerned with combustion instability of liquid propellants which are dominated by the entropy mode with the presence of usual acoustic and vortical mode. These combined modes leads to nonlinear unstable waves which may occur in combustors. In this study instability in a liquid propellant rocket is investigated. It is shown that the time rate of change of energy growth factor decrease with the increase of the energy growth factor. Tendency toward instability is more likely in turbulence than in laminar flows and. in chemically reacting than in frozen flows. It is further shown that the linear analysis tends to overpredict stability and the unstable wave motions in the liquid propellant rocket thrust chamber are dictated mostly by the entropy mode.

Original languageEnglish
Publication statusPublished - 1999 Jan 1
Event35th Joint Propulsion Conference and Exhibit, 1999 - Los Angeles, United States
Duration: 1999 Jun 201999 Jun 24

Other

Other35th Joint Propulsion Conference and Exhibit, 1999
CountryUnited States
CityLos Angeles
Period99/6/2099/6/24

Fingerprint

Liquid propellants
Rockets
Entropy
Combustors
Laminar flow
Turbulence
Acoustics
Intercellular Signaling Peptides and Proteins

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Systems Engineering
  • Aerospace Engineering

Cite this

Lee, K. Y., & Yoon, W. S. (1999). Nonlinear wave instabilities of liquid propellants. Paper presented at 35th Joint Propulsion Conference and Exhibit, 1999, Los Angeles, United States.
Lee, K. Y. ; Yoon, W. S. / Nonlinear wave instabilities of liquid propellants. Paper presented at 35th Joint Propulsion Conference and Exhibit, 1999, Los Angeles, United States.
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Lee, KY & Yoon, WS 1999, 'Nonlinear wave instabilities of liquid propellants' Paper presented at 35th Joint Propulsion Conference and Exhibit, 1999, Los Angeles, United States, 99/6/20 - 99/6/24, .

Nonlinear wave instabilities of liquid propellants. / Lee, K. Y.; Yoon, W. S.

1999. Paper presented at 35th Joint Propulsion Conference and Exhibit, 1999, Los Angeles, United States.

Research output: Contribution to conferencePaper

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T1 - Nonlinear wave instabilities of liquid propellants

AU - Lee, K. Y.

AU - Yoon, W. S.

PY - 1999/1/1

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N2 - This paper is concerned with combustion instability of liquid propellants which are dominated by the entropy mode with the presence of usual acoustic and vortical mode. These combined modes leads to nonlinear unstable waves which may occur in combustors. In this study instability in a liquid propellant rocket is investigated. It is shown that the time rate of change of energy growth factor decrease with the increase of the energy growth factor. Tendency toward instability is more likely in turbulence than in laminar flows and. in chemically reacting than in frozen flows. It is further shown that the linear analysis tends to overpredict stability and the unstable wave motions in the liquid propellant rocket thrust chamber are dictated mostly by the entropy mode.

AB - This paper is concerned with combustion instability of liquid propellants which are dominated by the entropy mode with the presence of usual acoustic and vortical mode. These combined modes leads to nonlinear unstable waves which may occur in combustors. In this study instability in a liquid propellant rocket is investigated. It is shown that the time rate of change of energy growth factor decrease with the increase of the energy growth factor. Tendency toward instability is more likely in turbulence than in laminar flows and. in chemically reacting than in frozen flows. It is further shown that the linear analysis tends to overpredict stability and the unstable wave motions in the liquid propellant rocket thrust chamber are dictated mostly by the entropy mode.

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M3 - Paper

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Lee KY, Yoon WS. Nonlinear wave instabilities of liquid propellants. 1999. Paper presented at 35th Joint Propulsion Conference and Exhibit, 1999, Los Angeles, United States.