Controllable Solid Rocket Motor Nozzle Operations in Conditions of Limited-Amplitude Fluctuations

Giuseppe Lombardo, Giuseppe Lombardo, Giuseppe Lombardo

Risultato della ricerca: Other

Abstract

A nonlinear multi scale analysis of a controllable solid rocket motor operating in conditions ranging from high-amplitude fluctuations in combustion chamber to conditions lying in limit cycle is presented and the motor behavior subsequent to some relevant nozzle operations is investigated. Effects of acoustic-vorticity-entropy wave coupling, wave steepening, rotational/viscous flow losses, steep-fronted wave losses are taken into account and oscillatory energy losses in pintle-nozzle, unsteady combustion and chamber geometry changes resulting from grain regression are included. The analysis provides evidence that the unsteady energy balance and the motor wave amplitude evolution are influenced by severity, direction and sequence of nozzle operations. This open the perspective of a new concept of controlling the wave amplitude evolution and the opportunity to enlarge the operational limits of controllable solid rocket motors are discussed.
Lingua originaleEnglish
Pagine1-16
Numero di pagine16
Stato di pubblicazionePublished - 2009

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Rocket engines
Nozzles
Viscous flow
Combustion chambers
Energy balance
Vorticity
Energy dissipation
Entropy
Acoustics
Geometry

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Control and Systems Engineering
  • Space and Planetary Science
  • Energy(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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Controllable Solid Rocket Motor Nozzle Operations in Conditions of Limited-Amplitude Fluctuations. / Lombardo, Giuseppe; Lombardo, Giuseppe; Lombardo, Giuseppe.

2009. 1-16.

Risultato della ricerca: Other

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abstract = "A nonlinear multi scale analysis of a controllable solid rocket motor operating in conditions ranging from high-amplitude fluctuations in combustion chamber to conditions lying in limit cycle is presented and the motor behavior subsequent to some relevant nozzle operations is investigated. Effects of acoustic-vorticity-entropy wave coupling, wave steepening, rotational/viscous flow losses, steep-fronted wave losses are taken into account and oscillatory energy losses in pintle-nozzle, unsteady combustion and chamber geometry changes resulting from grain regression are included. The analysis provides evidence that the unsteady energy balance and the motor wave amplitude evolution are influenced by severity, direction and sequence of nozzle operations. This open the perspective of a new concept of controlling the wave amplitude evolution and the opportunity to enlarge the operational limits of controllable solid rocket motors are discussed.",
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AU - Lombardo, Giuseppe

AU - Lombardo, Giuseppe

AU - Lombardo, Giuseppe

PY - 2009

Y1 - 2009

N2 - A nonlinear multi scale analysis of a controllable solid rocket motor operating in conditions ranging from high-amplitude fluctuations in combustion chamber to conditions lying in limit cycle is presented and the motor behavior subsequent to some relevant nozzle operations is investigated. Effects of acoustic-vorticity-entropy wave coupling, wave steepening, rotational/viscous flow losses, steep-fronted wave losses are taken into account and oscillatory energy losses in pintle-nozzle, unsteady combustion and chamber geometry changes resulting from grain regression are included. The analysis provides evidence that the unsteady energy balance and the motor wave amplitude evolution are influenced by severity, direction and sequence of nozzle operations. This open the perspective of a new concept of controlling the wave amplitude evolution and the opportunity to enlarge the operational limits of controllable solid rocket motors are discussed.

AB - A nonlinear multi scale analysis of a controllable solid rocket motor operating in conditions ranging from high-amplitude fluctuations in combustion chamber to conditions lying in limit cycle is presented and the motor behavior subsequent to some relevant nozzle operations is investigated. Effects of acoustic-vorticity-entropy wave coupling, wave steepening, rotational/viscous flow losses, steep-fronted wave losses are taken into account and oscillatory energy losses in pintle-nozzle, unsteady combustion and chamber geometry changes resulting from grain regression are included. The analysis provides evidence that the unsteady energy balance and the motor wave amplitude evolution are influenced by severity, direction and sequence of nozzle operations. This open the perspective of a new concept of controlling the wave amplitude evolution and the opportunity to enlarge the operational limits of controllable solid rocket motors are discussed.

KW - Controllable

KW - Cycle

KW - Limit

KW - Motor

KW - Rocket

UR - http://hdl.handle.net/10447/42324

M3 - Other

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EP - 16

ER -