Abstract
After a brief review of fluid mechanics scaling, the rationale for testing in the National Transonic Facility (NTF) for ship hydromechanics purposes is discussed. Some pertinent details of the “1986 Body of Revolution Experiment” are presented along with possibilities for a “Future Body of Revolution Experiment” and a “Future Rat Plate Experiment”. Finally NTF testing is considered from the “hydrodynamic” users point of view and a brief comparison is made between the NTF and the Conceptual Helium Tunnel (CHT), which is of major interest to this Conference.
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Abbreviations
- A:
-
Wake parameter in Fig. 5
- AMODEL :
-
Cross-sectional area of model
- ATUNNEL :
-
Cross-sectional area of Tunnel
- c:
-
Speed of sound in fluid
- D:
-
Diamenter of model
- Eu:
-
Euler number (=p/(pV2))
- Fn :
-
Froude number (=V/(gL)1/2)
- g:
-
Acceleration of Gravity
- L:
-
Model Length
- Mn :
-
Match Number (=V/c)
- n:
-
Power -law exponent in Fig. 4
- P:
-
General flow-field point in Fig. 2
- Po :
-
Total pressure of tunnel
- p:
-
Local static pressure
- \( {q_\infty } \) :
-
Dynamic pressure of tunnel
- R:
-
Maximum radius of body of revolution model
- Rn :
-
Reynolds number based on model length (=VL/v)
- Rθ :
-
Momemtum thickness Reynolds number (=Vθ/v)
- r:
-
Radial distance from model centerline
- T:
-
Total temperature of tunnel
- U:
-
Velocity magnitude
- V:
-
Free-stream velocity magniture = ship speed
- Vg :
-
Ship speed = free-stream velocity magnitude
- We:
-
Weber number (=γ/(ρV2L)
References
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© 1991 Springer-Verlag New York, Inc.
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Coder, D.W., Flechner, S.G., Peterson, J.B. (1991). On the Measurement of Subsonic Flow around an Appended Body of Revolution at Cryogenic Conditions in the NTF. In: Donnelly, R.J. (eds) High Reynolds Number Flows Using Liquid and Gaseous Helium. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3108-0_6
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DOI: https://doi.org/10.1007/978-1-4612-3108-0_6
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