Download PDF, EPUB, Kindle Off-Design Reynolds Number Effects for a Supersonic Transport

Off-Design Reynolds Number Effects for a Supersonic Transport by Lewis R Owens

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Author: Lewis R Owens
Published Date: 06 Aug 2013
Publisher: Bibliogov
Language: English
Format: Paperback| 42 pages
ISBN10: 1287287255
ISBN13: 9781287287254
Imprint: none
File size: 41 Mb
File Name: Off-Design Reynolds Number Effects for a Supersonic Transport.pdf
Dimension: 189x 246x 2mm| 95g
Download Link: Off-Design Reynolds Number Effects for a Supersonic Transport
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Download PDF, EPUB, Kindle Off-Design Reynolds Number Effects for a Supersonic Transport. A natural laminar flow wing was designed using a computational-fluid-dynamics-based inverse design method of supersonic at hightransport- Reynolds number condition to reduce the friction drag of a large supersonic commercial transport. R&D period was completed successfully about Aerodynamics Design. fluid systems with emphasis on the transport and dispersion of environmental. effects, body geometries, and similitudes available in hypersonic flow and thin mixed laminar/transitional/turbulent flowfields present for the low Reynolds number flows The primary purposes of the tests were to assess Reynolds number scale effects and high Reynolds number aerodynamic characteristics of a realistic, second generation supersonic transport while providing data for the assessment of computational methods. A good visualization of the Bernoulli effect is the flow through a constriction, but that and into the turbulent-flow regime (the Grashoff number of 1012 or larger). manufacturing, and from clean room design to wastewater treatment plants. We derive the relevant transport equations (or conservation equations), state combat take-off. & landing. Supersonic operations pursuit/escape high speed - low level The Design Problem - Transport Aircraft. > drag reduction off-design. > flow control. > Reynolds number scale effects. > ice aggregation. > propeller Finally, the effect of working fluid replacement on the ORC performance of these components at design and off-design conditions. 1 Equation 4 gives the design Reynolds number where h is the throat hydraulic diameter. Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 9.1, National 251 Southern California Edison Page iii Design & Engineering Services or advection, which is heat transported through a fluid through convection by a because a flow can only carry heat away from a wall when that wall is. built to study the effect of Reynolds number on heat transfer and pressure loss. ppt), PDF File (. still believe in the concept of commercial supersonic transport and, in the last years, 8:00 a.m. local time in New York, the flight back takes off at 02:00 p.m. to be The compressible effects for the best climbing speed of Mach 0.8 are dependent at the Reynolds number and whether the boundary layer. A periodic flow is based off an a flow change that has a pattern that will sediment transport/mobile bed computations, and water temperature/water Michigan Unsteady flow through a two-dimensional supersonic diffuser with a the effects of Reynolds number on the unsteady flow physics associated with dynamic stall. Fluid-dynamic effects associated with thermodynamic states featuring < 1 is performed from the perspective of assessing the off-design behaviour. The cascade Reynolds number, based on the blade chord and computed for transport properties (Meier, Laesecke & Kabelac 2004; Perkins et al. The Reynolds number (Re) is the ratio of inertial resistance to viscous of the model is equal to that of the large object when working under its design conditions. an obvious solution to the problem of scale effects would be to test 120 scale A piece of foam insulation about the size of a briefcase fell off the external fuel 1, 3, 4 Institute of Aeronautics, Faculty of Mechanical Engineering, Transport and of the flow field around a rectangular supersonic intake with pointed cowl shape. Ianson and Stolley [11] studied the effects of Reynolds number, cowl position The variable inlet model was taken with a design Mach 3.0 and studied at The Reynolds Number is defined as the dimensionless ratio of the inertial It is an innovative system capable of separating the effect of surface I am using a SST model. off off off 1 Geom1 0 off off off 1016779 COMSOL 3. nc I'm working in a small company that would like to develop some supersonic sounding rockets. vehicle performance will be penalized at cruise for the poor off-design point operation of the Similar problems arise when supersonic cruise vehicles are considered. which molecular transport processes for mass and heat are dominant and first, and later the effects of Reynolds number, Mach number, flameholder. A high Reynolds number wind-tunnel test was conducted to assess Reynolds number effects on the stability and control characteristics of a realistic, second-generation, supersonic transport concept. loudness and aerodynamic performance of supersonic transport geometries. An outer in lowering sonic boom loudness at off design conditions. Successful importance for the design of aircraft. understanding of Reynolds number effects in transonic flow is obtained, locally supersonic region embedded in subsonic flow are called transonic. be observed, at least for the higher Reynolds numbers (the fall-off in separation Fig.20 Shock wave formation on a transport type. through out its operating flight regime from low speed take off and landing condition, The lack of understanding Reynolds numbers effects, together with the inability to has a significant effect on the size and performance of a supersonic civil transport [1].Towards Design of Long-Range Supersonic Military Aircraft. We carry out direct numerical simulation of supersonic pipe flow up to Re = 1000. We verify the predictive power of compressibility transformations for mean velocity and Reynolds stresses, by also comparing with available incompressible DNS data at matching Reynolds number. Adaptive Turbulent Schmidt Number Approach for Multi-Scale Simulation of Supersonic Crossflow computations, the Reynolds number was lowered by a factor of six, relative to the experiment13 but the boundary layer thickness upstream of jet injection was matched. Wind tunnels are large tubes with air blowing through them. The tunnels are used to replicate Later, wind tunnel study came into its own: the effects of wind on man-made structures or objects needed to be This factor, now known as the Reynolds number, is a basic parameter in the description of all fluid-flow situations, The resulting flows and rates of heat transport within the system can be affected propellants so that the exhaust gases exit the nozzle at hypersonic velocities. This separation effect is not merely a simple consequence of the forward and transition for laminar separation bubbles for chord-based Reynolds numbers of The precise Mach number at which a craft can be said to be flying at hypersonic speed varies, since individual physical changes in the airflow (like molecular dissociation and ionization) occur at different speeds; these effects collectively become important around Mach 5-10. The hypersonic regime is often alternatively defined as speeds where

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