The Convergent-Divergent (CD) nozzles are designed for a optimum operating Exit Mach number. The proper area ratio (Ae/At) and Pressure ration (Pi/P) is necessary to generate the required Mach number in the CD nozzle. The experiment is conducted for nozzle designed for exit Mach number 3.0.
The pressure ratio (Pi/P) is calculated from isentropic relation given below
The Area ratio (Ae/At) is calculated from the Area-Mach number relation
Where
Pi - Nozzle Inlet pressure
P - Nozzle exit pressure
γ - Specific heat ratio
M - Designed Mach number
Ae - Nozzle Exit Area
At - Nozzle Throat Area
Experimental Setup of High speed Jet Facility
Schematic view of High speed jet facility
Flow particle track through a CD Nozzle
Schematic diagram of CD nozzle