2 edition of Wind-tunnel investigation of the validity of a sonic-boom-minimization concept found in the catalog.
Wind-tunnel investigation of the validity of a sonic-boom-minimization concept
Robert J. Mack
by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va
Written in English
|Statement||Robert J. Mack and Christine M. Darden.|
|Series||NASA technical paper -- 1421.|
|Contributions||Darden, Christine M., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., Langley Research Center.|
|The Physical Object|
|Pagination|| p. :|
|Number of Pages||45|
In this book, the authors discuss the design and construction, types and usage limitations of wind tunnels. Topics include the use of wind tunnels to analyze wind loading on scaffold structures; the characteristics of the Architecture and Building Research Institute wind tunnel project; analysis of the wind environment and air quality in densely populated areas using wind tunnel experiments. Wind-tunnel Technique: An Account of Experimental Methods in Low- and High-speed Wind Tunnels R. C. Pankhurst, Douglas William Holder Pitman, - Souffleries aérodynamiques - .
The wind tunnel balances, comprised by several hardware and software components, provides directly the pursued measurements, with high accuracy and reliability. For these reasons, among others, wind tunnel balances have become a common tool in testing facilities. This chapter starts with a general description of wind tunnel by: 4. Design and Evaluation of a Pressure Rail for Sonic Boom Measurement in Wind Tunnels S. Cliff1, A. Elmiligui2, A pressure rail concept for wind tunnel sonic boom measurement of Sonic boom minimization is the largest technical hurdle to overcome before worldwide entry of.
Wind-excited oscillations of structures: wind-tunnel techniques for their investigation and prediction [Denis Eugene Joseph Walshe] on *FREE* shipping on qualifying : Denis Eugene Joseph Walshe. Sonic boom minimization including both front and rear shocks. Wind Tunnel Testing on Start/Unstart Characteristics of Finite Supersonic Biplane Wing. International Journal of Aerospace Engineering, Vol. Sonic Boom Minimization Revisited: The Robustness of Optimal Low-Boom by:
The Langley unitary plan unitary plan wind tunnel was used to determine the validity of a sonic-boom-minimization theory. Five models - two reference and three low-boom constrained - were tested at design Mach numbers of and Wind-tunnel Investigation of the Validity of a Sonic-boom-minimization Concept Robert J.
Mack, Christine M. Darden National Aeronautics and Space Administration, - 47 pages. Wind-tunnel investigation of the validity of a sonic-boom-minimization concept.
Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.
A WIND-TUNNEL INVESTIGATION OF SONIC-BOOM PRESSURE DISTRIBUTIONS OF BODIES OF REVOLUTION AT MACH, AND By Barrett L. Shrout, Robert J. Mack, and Samuel M. Dollyhigh Langley Research Center SUMMARY Sonic-boom pressure signature measurements were made for a series of bodies ofFile Size: 1MB.
A wind-tunnel investigation has been conducted to determine the validity and applicability of a sonic-boom-minimization theory. Five models - two refer-ence and three low-boom constrained - were tested at design Mach numbers of ].5 and and at angles of attack which provided the same lift.
Pressure signa. Minimum Sonic-Boom Overpressures for Supersonic Cruise Aircraft Christine M. Darden MARCH 1 Wind-Tunnel Investigation of the Validity of a Sonic-Boom-Minimization Concept. NASA TP, 9. Mack, File Size: 3MB. The Langley unitary plan unitary plan wind tunnel was used to determine the validity of a sonic-boom-minimization theory.
Five models - two reference and three low-boom constrained - were tested at Author: Robert J. Mack. The Langley unitary plan unitary plan wind tunnel was used to determine the validity of a sonic-boom-minimization theory.
Five models - two reference and three low-boom constrained. An overpressure ground signature with more than two shocks is proposed for sonic boom minimization. A procedure coupling linear-theory-based sonic boom theory with a state-of-the-art optimization tool is presented.
The method is used to reshape a candidate supersonic aircraft for a reduced initial shock pressure by: 4. wind-tunnel tests. Investigations on the EFTV glider concept are being provided by all the partners of the HEXAFLY-INT project, i.e.
European, Russian and Australian entities, and include CFD, windtunnel and flight tests.- The current paper presents CFD and experimental research on aerodynamics of the EFTV powered concept provided by TsAGI. Fig. Size: 1MB. WIND-TUNNEL INVESTIGATION OF SONIC-BOOM CHARACTERISTICS OF A DELTA-WING-BODY COMBINATION AT MACH NUMBERS OF AND By Ode11 A.
Morris Langley Research Center SUMMARY An investigation has been conducted in the Langley 4- by 4-foot supersonic pressure tunnel at Mach numbers of and to determine the sonic-boom File Size: KB.
Follow-on sonic boom minimization investigations by McFean 5 indicated that for large slender airplanes during the climb-to-cruise phase of flight, non- N-wave near-field sonic boom signatures exist which depend on the detailed geometry of the airplane and that these non-asymptotic effects could be very important compared to the asymptotic far.
This can be divided into its two components, the frequency of occurrence of a given mean hourly wind and the frequency of occurrence of a given value of pressure within that wind.
It is important to separate this term thus because of the way in which data for this subject are obtained. Design values come from wind tunnel by: A Wind-Tunnel Investigation of Sonic-Boom Pressure Distributions of Bodies of Revolution at Mach, And Mack, Robert J.; and Darden, Christine M.: Wind Tunnel Investigation of the Validity of a Sonic Boom-Minimization Concept.
NASA Technical PaperOctober International CFD Workshop for Super-Sonic Transport Design. Application of sonic-boom minimization concepts to the design of models for a wind-tunnel test program to assess their validity is discussed later.
Now it might be more appropriate to consider program results which serve to establish design goal levels of sonic-boom parameters and to shoti their variation. There have been many attempts to reduce or eliminate the sonic boom.
Such attempts fall into two categories: (1) aerodynamic minimization and (2) exotic configurations. In the first category changes in the entropy and the Bernoulli constant are neglected and equivalent body shapes required to minimize the overpressure, the shock pressure rise and the impulse Cited by: random and correlated bias errors in wind-tunnel experiments than traditional methods.
Consistent with the authors™ contention that nondeterministic simulations are needed in many validation comparisons, a three-step statistical approach is offered for incorporating experimental uncertainties into the computational by: Abstract. The intention of wind-tunnel experiments (or in general physical modelling, including water-tank experiments) is to reproduce the characteristics of the atmospheric boundary layer on a small geometric scale, typically between 1/ th and 1/ th of the real world.
In the previous chapters, numerical models were grouped into different classes depending on the scales they Cited by: Indraft Supersonic Wind Tunnel for Shock Train Investigations. 2 August A new design concept for indraft wind-tunnel inlets with applicationto the National Full-Scale Aerodynamics Complex.
Optimum design of wind tunnel contractions. MIKHAIL and Cited by: The wind tunnel has the same ratio of length as the domain for computation. Figure 11 is the mean velocity field by the experiment at the same Reynold's number and the same intensity of turbulence.
Compareing the result of the analysis (Fig. 9 and 10) with this, the location of the vortex is higher a little.
The aerodynamic performance of bridge deck girders requires a thorough assessment and optimization in the design of long-span bridges. The present paper describes a numerical investigation of the aerodynamic characteristics of a twin-box bridge girder cross section in the range of angles of attack between −° and +°.
The simulations are performed by Cited by: 3.Great wind tunnel book! Very instructive! Contains everything one needs to know about low speed sub-sonic wind tunnel.
This is a must have book for anyone who is interested in wind tunnel theory, design and testing. Also, the book arrived within a couple of days, excellent service from ordering to receiving the by: The book “Wind Tunnels and Experimental Fluid Dynamics Research” is comprised of 33 chapters divided in five sections.
The first 12 chapters discuss wind tunnel facilities and experiments in incompressible flow, while the next seven chapters deal with building dynamics, flow control and fluid mechanics. Third section of the book is dedicated to chapters discussing Cited by: 5.