An experimental study of diffusers in an open-jet, low-density, hypersonic wind tunnel PDF Download
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Author: David E. Boylan Publisher: ISBN: Category : Diffusers Languages : en Pages : 72
Book Description
An experimental investigation of supersonic diffuser performance in a flow regime in which viscous and compressibility influences are equally important was conducted. The investigation involved Mach numbers from 6 to 16.5. It is shown that, although diffuser recovery compared to higher density regimes is small, using the proper diffuser allowed the required wind tunnel exhaust pressure to be up to 35 times the pressure existing in the test chamber. While this may not seem exceptional at first glance, it is important to note that this was achieved in conjunction with Reynolds numbers on the order of 10 to the minus 3 power below those typical of tunnels yielding higher recoveries. (Author).
Author: David E. Boylan Publisher: ISBN: Category : Diffusers Languages : en Pages : 72
Book Description
An experimental investigation of supersonic diffuser performance in a flow regime in which viscous and compressibility influences are equally important was conducted. The investigation involved Mach numbers from 6 to 16.5. It is shown that, although diffuser recovery compared to higher density regimes is small, using the proper diffuser allowed the required wind tunnel exhaust pressure to be up to 35 times the pressure existing in the test chamber. While this may not seem exceptional at first glance, it is important to note that this was achieved in conjunction with Reynolds numbers on the order of 10 to the minus 3 power below those typical of tunnels yielding higher recoveries. (Author).
Author: James J. White (III) Publisher: ISBN: Category : Aerodynamics, Hypersonic Languages : en Pages : 0
Book Description
A fixed-geometry diffuser system was tested in an arc-heated, hypersonic, open-jet wind tunnel facility at Mach numbers between 14 and 18 and Reynolds numbers (based on nozzle exit diameter) between 8,900 and 25,000. Tests were conducted both with an empty test section and with conical models in the flow. Test variables included test section open-jet length, diffuser second-throat length, and diffuser inlet geometry. Diffuser efficiency improved with increased diffuser second-throat length, with increasing Reynolds number, and with the addition of conical models into the flow. Changes in open-jet length and diffuser inlet geometry had no appreciable effect on diffuser efficiency with an empty test section. A streamlined model support strut produced marked improvement in diffuser efficiency over a blunt support strut.
Author: Publisher: ISBN: Category : Languages : en Pages : 45
Book Description
A fixed-geometry diffuser system was tested in an arc-heated, hypersonic, open-jet wind tunnel facility at Mach numbers between 14 and 18 and Reynolds numbers (based on nozzle exit diameter) between 8,900 and 25,000. Tests were conducted both with an empty test section and with conical models in the flow. Test variables included test section open-jet length, diffuser second-throat length, and diffuser inlet geometry. Diffuser efficiency improved with increased diffuser second-throat length, with increasing Reynolds number, and with the addition of conical models into the flow. Changes in open-jet length and diffuser inlet geometry had no appreciable effect on diffuser efficiency with an empty test section. A streamlined model support strut produced marked improvement in diffuser efficiency over a blunt support strut.
Author: David E. Boylan
Author: David E. Boylan
Author: James J. White (III)
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Author: George Atholstone Mellard
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Author: Rutgers University. College of Engineering