78
3 Subsonic Wind Tunnels
Fig. 3.38 The large anechoic chamber of the LMFA (© LMFA)
flow, (B) secondary flow
vehicle model
(a) Aeroacoustics of coaxial jets. (A) primary (b) Aerodynamics and aeroacoustics of a land
Fig. 3.39 Examples of studies in the LMFA aeroacoustic wind tunnel (© LMFA)
(see Fig. 3.39b), or for metrological developments in aeroacoustics (optical methods, innovative sensors for wall pressure, methods and antennas for localisation of
sources).
The jets can be coupled in order to exploit the acoustic characteristics of supersonic
jets in flight conditions in the set-up shown in Fig. 3.39a. The flow from the supersonic
nozzle acts as the primary jet and a secondary jet is generated by the subsonic nozzle
in the conditions similar to that of the turbofan engines.
3 Subsonic Wind Tunnels
Fig. 3.38 The large anechoic chamber of the LMFA (© LMFA)
flow, (B) secondary flow
vehicle model
(a) Aeroacoustics of coaxial jets. (A) primary (b) Aerodynamics and aeroacoustics of a land
Fig. 3.39 Examples of studies in the LMFA aeroacoustic wind tunnel (© LMFA)
(see Fig. 3.39b), or for metrological developments in aeroacoustics (optical methods, innovative sensors for wall pressure, methods and antennas for localisation of
sources).
The jets can be coupled in order to exploit the acoustic characteristics of supersonic
jets in flight conditions in the set-up shown in Fig. 3.39a. The flow from the supersonic
nozzle acts as the primary jet and a secondary jet is generated by the subsonic nozzle
in the conditions similar to that of the turbofan engines.