The Effect of Plenum Volume on the Test Section Flow Characteristics of a Perforated Wall Transonic Tunnel PDF Download
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Author: C. F. Anderson Publisher: ISBN: Category : Transonic wind tunnels Languages : en Pages : 72
Book Description
Tests were conducted in the Aerodynamic Wind Tunnel (1T) of the Propulsion Wind Tunnel Facility to determine the effects of test section plenum chamber volume on the centerline Mach number distributions, wave-cancellation properties of perforated walls, model force data, and tunnel acoustics at Mach numbers from 0.6 to 1.3. Results were obtained with plenum chambers of four different sizes at plenum-to-test section volume ratios between 8.3 and 0.8. Reducing plenum volume produced no measurable effect at Mach numbers below 0.95. At Mach numbers above 0.95, decreasing the plenum volume increased the internal plenum losses, increased the plenum suction requirements, and increased the centerline Mach number deviations; however, the Mach number deviations were small at Mach numbers below 1.15. Reducing the plenum volume also produced a small increase in the effective wall porosity but had no measurable effect on measured model forces except to increase the forebody drag coefficient at Mach numbers above 1.05. Changes in the plenum volume had no significant effect on tunnel acoustics. (Author).
Author: C. F. Anderson Publisher: ISBN: Category : Transonic wind tunnels Languages : en Pages : 72
Book Description
Tests were conducted in the Aerodynamic Wind Tunnel (1T) of the Propulsion Wind Tunnel Facility to determine the effects of test section plenum chamber volume on the centerline Mach number distributions, wave-cancellation properties of perforated walls, model force data, and tunnel acoustics at Mach numbers from 0.6 to 1.3. Results were obtained with plenum chambers of four different sizes at plenum-to-test section volume ratios between 8.3 and 0.8. Reducing plenum volume produced no measurable effect at Mach numbers below 0.95. At Mach numbers above 0.95, decreasing the plenum volume increased the internal plenum losses, increased the plenum suction requirements, and increased the centerline Mach number deviations; however, the Mach number deviations were small at Mach numbers below 1.15. Reducing the plenum volume also produced a small increase in the effective wall porosity but had no measurable effect on measured model forces except to increase the forebody drag coefficient at Mach numbers above 1.05. Changes in the plenum volume had no significant effect on tunnel acoustics. (Author).
Author: Douglas Earl Bush Publisher: Psychology Press ISBN: 0415941741 Category : Organ (Musical instrument) Languages : en Pages : 696
Book Description
Organ, Volume 3 of the Encyclopedia of Keyboard Instruments, includes articles on the organ family of instruments, including famous players, composers, instrument builders, the construction of the instruments and related terminology. It is the first complete reference on this important family of keyboard instruments that predated the piano. The contributors include major scholars of music and musical instruments from around the world.
Author: Roderick MacFarquhar Publisher: Cambridge University Press ISBN: 9780521588638 Category : History Languages : en Pages : 626
Book Description
The essays that make up this volume offer the reader a full introduction to, and analysis of, the politics of the People's Republic of China from 1949 to the mid 1990s
Author: Ellis Joffe Publisher: University of Michigan Press ISBN: 047290213X Category : History Languages : en Pages : 89
Book Description
The origins of the Cultural Revolution are still shrouded in uncertainty. Crucial questions either remain unanswered or have been given answers which derive from conflicting interpretations. To what period can the direct origins of the Cultural Revolution be traced? What issues, if any, divided the leadership, and how deep were these divisions? What was the state of power relations and what was Mao’s position? Why did developments in the period preceding the Cultural Revolution reach a climax in such a convulsion? Between Two Plenums examines these questions as they apply to the years 1959–1962. At base, the perspective of pre-Cultural Revolution politics adopted therein is that of “conflict” rather than “consensus.” From this vantage point, the Eighth and Tenth Plenums loom in retrospect as important watersheds in the development of the intraleadership conflict which culminated in the great upheaval.
Author: Jerry C. Whitaker Publisher: CRC Press ISBN: 9780849383458 Category : Technology & Engineering Languages : en Pages : 2626
Book Description
The superb organization of The Electronics Handbook means that it is not only a comprehensive and fascinating reference, but also a pleasure to use. Some of these organizational features include:
Author: C. F. Anderson
Author: C. F. Anderson
Author: Douglas Earl Bush
Author: Roderick MacFarquhar
Author: Geoffreyjen Edwards
Author: Ellis Joffe
Author: Jerry C. Whitaker
Author: Saint Louis (Mo.). Board of Education
Author: Saint Louis (Mo.). Board of Education
Author: 
Author: United States. Patent and Trademark Office