F. S. Alvi

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Examples Uses of JetsPitot Static Probes -
SummaryEML 4304L
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JSF - STOVL Version
Boeing X-32 (CDP) USMC Version
Lockheed-Martin X-35 (CDP) USMC Version
Images obtained from the Official US
Government, DOD, JSF Site
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Examples Uses of Jets
Ground Effect for a STOVL aircraft in hover
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Examples Uses of Jets
F22 Raptor
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Supersonic Inlets Diffusers
(http//www.grc.nasa.gov/WWW/K-12/airplane/lowsup.
html)
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Micro-nozzles
(Supersonic) Microjets
C-D Micro-nozzles
Converging/Sonic Micro- nozzles
F. S. Alvi alvi_at_eng.fsu.edu
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100 mm
Supersonic Microjets
Flow Visualization Results
100 mm PO 100 Psi
200 mm PO 120 Psi
400 mm PO 120 Psi
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Supersonic Jets
Mach 2 Rectangular Jets
Sonic Round ? jet (0.4 mm)
Vectored Rectangular Jets
Mach 2 Round vectored Jet (30 mm)
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Jet Properties
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Summary of (some) Fluids Concepts Learned in
3015C (contd)

• Conservation of Momentum - If viscosity is
  neglected
• Eulers Equation
• Integrate Eulers equation along a streamline
  to obtain Bernoullis Equation
• It is only valid for incompressible fluids,
  steady flow along a streamline, no energy loss
  due to friction, no heat transfer
• Conservation of Energy - If energy is added,
  removed or lost via pumps turbines, friction,
  etc.then we use the energy equation or Extended
  Bernoullis Equation

Where hA , hE is work done by or on the systems,
e.g turbines, pumps, etc. and hL is Frictional
Head Loss where
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Pitot probes

• At station 1, the fluid is moving
• P1 Pstatic OR simply Ps V1 V
• At station 2, the fluid is rest
• P2 Ppitot OR Ptotal OR Pstognation OR P0
  and V2 0 (fluid is at rest)
• Hence, Bernoullis Equation is reduced to