Large solid rocket motors (SRMs) may exhibit pressure oscillations (PO) during their quasi-steady-state due to the coupling between chamber acoustic, usually the longitudinal modes, and other typical physical phenomena related to the combustion products flow, leading to a resonant condition. Although dissipative effects, occurring inside the motor chamber, prevent the reaching of high PO level, oscillating phenomena induce a dynamic environment on the launcher which could reduce payload comfort and safety. Both large segmented SRMs - e.g. Ariane 5 and Space Shuttle boosters - and monolithic finocyl SRMs - e.g. P80 of VEGA, exhibit pressure oscillations phenomena but in different functioning phases: the second half of the SRM operative life for segmented SRMs and the first half for aft-finocyl ones. This study aims to discuss and analyze the signatures and the associated dispersion of PO phenomena in P80 SRM, exploiting data provided by the 11 flights (VV01-VV11) successfully accomplished by VEGA launcher. Pressure oscillations are characterized both in time and frequency domain. The experimental P80 SRM PO signature are then reconstructed by means of the Q1D model named AGAR, showing the capability of the model to represent with good correlation the whole PO scenario and to recover also the data dispersion.

P80 SRM Pressure Oscillations Reconstruction / Laureti, Mariasole; Rossi, Giacomo; Favini, Bernardo; Paglia, Fabio. - (2018). (Intervento presentato al convegno AIAA Propulsion and Energy Forum 2018 Joint Propulsion Conference tenutosi a Cincinnati, Ohio, USA) [10.2514/6.2018-4789].

P80 SRM Pressure Oscillations Reconstruction

Laureti Mariasole;Rossi Giacomo;Favini Bernardo;Paglia fabio
2018

Abstract

Large solid rocket motors (SRMs) may exhibit pressure oscillations (PO) during their quasi-steady-state due to the coupling between chamber acoustic, usually the longitudinal modes, and other typical physical phenomena related to the combustion products flow, leading to a resonant condition. Although dissipative effects, occurring inside the motor chamber, prevent the reaching of high PO level, oscillating phenomena induce a dynamic environment on the launcher which could reduce payload comfort and safety. Both large segmented SRMs - e.g. Ariane 5 and Space Shuttle boosters - and monolithic finocyl SRMs - e.g. P80 of VEGA, exhibit pressure oscillations phenomena but in different functioning phases: the second half of the SRM operative life for segmented SRMs and the first half for aft-finocyl ones. This study aims to discuss and analyze the signatures and the associated dispersion of PO phenomena in P80 SRM, exploiting data provided by the 11 flights (VV01-VV11) successfully accomplished by VEGA launcher. Pressure oscillations are characterized both in time and frequency domain. The experimental P80 SRM PO signature are then reconstructed by means of the Q1D model named AGAR, showing the capability of the model to represent with good correlation the whole PO scenario and to recover also the data dispersion.
2018
AIAA Propulsion and Energy Forum 2018 Joint Propulsion Conference
Solid Rocket Prupulsion, Aeroacoustics
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
P80 SRM Pressure Oscillations Reconstruction / Laureti, Mariasole; Rossi, Giacomo; Favini, Bernardo; Paglia, Fabio. - (2018). (Intervento presentato al convegno AIAA Propulsion and Energy Forum 2018 Joint Propulsion Conference tenutosi a Cincinnati, Ohio, USA) [10.2514/6.2018-4789].
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1188685
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact