Plasma Anemometer for High Speed Flows

1
Plasma Anemometer forHigh Speed Flows
OBJECTIVE Develop a robust, high frequency
response sensor for mass-flux measurements in
hypersonic flows. - Frequency response
1MHz. - High enthalpy
capability. - Small measurement volume.
- Insensitive to temperature.
- Low power 5 Watt, 350 Vrms.
- Wireless Transmission.
ISSI Innovative Scientific Solutions, Inc.
Real Time Graphical Display
GnuRadio Real Time Demodulation
A.C. Carrier Approach
GnuRadio Board
fc
fm
Velocity Fluctuations
U
NL
A.C. Carrier
Modulated Carrier
Facq 64 MHz
To host PC
Spectral Domain
Carrier rms Gives Mean
Side-Band rms Give Fluctuations
Mach 1.4 Turbulent B.L.Fluctuation Profile
Fluctuation Response
Cylinder Wake Mach 5 WPAFB Rarified Air Tunnel
35kHz
Application Internal Flows of Turbo Machinery