Fluidic Control of Transition in a Dual-bell Nozzle

2020 ◽  
Author(s):  
Andrea Ferrero ◽  
Emanuele Martelli ◽  
Francesco Nasuti ◽  
Dario Pastrone
Keyword(s):  
Fluidic Control ◽  
Dual Bell

Dual-bell nozzle for space launchers with fluidic control of transition

2021 ◽  
Author(s):  
Andrea Ferrero ◽  
Antonietta Conte ◽  
Emanuele Martelli ◽  
Francesco Nasuti ◽  
Dario Pastrone
Keyword(s):  
Fluidic Control ◽  
Dual Bell

Assessment of transition regimes in a dual-bell nozzle and possibility of active fluidic control

2018 ◽  
Vol 82-83 ◽  
pp. 1-8 ◽  
Author(s):  
Vladeta Zmijanovic ◽  
Luc Leger ◽  
Mohamed Sellam ◽  
Amer Chpoun
Keyword(s):  
Fluidic Control ◽  
Dual Bell

Dual-bell nozzle with fluidic control of transition for space launchers

2022 ◽  
Author(s):  
Andrea Ferrero ◽  
Antonietta Conte ◽  
Emanuele Martelli ◽  
Francesco Nasuti ◽  
Dario Pastrone
Keyword(s):  
Fluidic Control ◽  
Dual Bell

Fluidic Control of Asymmetric Forces on a Body of Revolution

2008 ◽  
Author(s):  
Philip Abramson ◽  
Bojan Vukasinovic ◽  
Ari Glezer
Keyword(s):  
Body Of Revolution ◽  
Fluidic Control

Active Control of Dual-Bell Nozzle Operation Mode Transition by Film Cooling and Mixture Ratio Variation

2020 ◽  
Vol 36 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Dirk Schneider ◽  
Ralf Stark ◽  
Chloé Génin ◽  
Michael Oschwald ◽  
Konstantin Kostyrkin
Keyword(s):  
Active Control ◽  
Film Cooling ◽  
Operation Mode ◽  
Mode Transition ◽  
Mixture Ratio ◽  
Ratio Variation ◽  
Dual Bell

scholarly journals Numerical Analysis of Side-loads Reduction in a Sub-scale Dual-bell Rocket Nozzle

2021 ◽  
Author(s):  
M. Cimini ◽  
E. Martelli ◽  
M. Bernardini
Keyword(s):  
Inflection Point ◽  
Pressure Ratio ◽  
Mean Value ◽  
Detached Eddy Simulation ◽  
Turbulent Structures ◽  
Eddy Simulation ◽  
Separation Shock ◽  
Delayed Detached Eddy Simulation ◽  
Controlled Flow ◽  
Dual Bell

AbstractA calibrated delayed detached eddy simulation of a sub-scale cold-gas dual-bell nozzle flow at high Reynolds number and in sea-level mode is carried out at nozzle pressure ratio NPR = 45.7. In this regime the over-expanded flow exhibits a symmetric and controlled flow separation at the inflection point, that is the junction between the two bells, leading to the generation of a low content of aerodynamic side loads with respect to conventional bell nozzles. The nozzle wall-pressure signature is analyzed in the frequency domain and compared with the experimental data available in the literature for the same geometry and flow conditions. The Fourier spectra in time and space (azimuthal wavenumber) show the presence of a persistent tone associated to the symmetric shock movement. Asymmetric modes are only slightly excited by the shock and the turbulent structures. The low mean value of the side-loads magnitude is in good agreement with the experiments and confirms that the inflection point dampens the aero-acoustic interaction between the separation-shock and the detached shear layer.

Fluidic Control of Nacelle Inlet Flow in Crosswind

2020 ◽  
Author(s):  
Derek A. Nichols ◽  
Bojan Vukasinovic ◽  
Ari Glezer ◽  
Matthew DeFore ◽  
Bradley Rafferty
Keyword(s):  
Inlet Flow ◽  
Fluidic Control
Sign in / Sign up

Export Citation Format

Share Document