Author: Qian LiaoPublisher:
ISBN:
Category :
Languages : en
Pages : 514
Book Description
An Experimental Investigation of Plume Dispersion in a Turbulent Boundary Layer and Implications for Plume Tracing
Author: Qian LiaoAn Experimental Investigation of Transition in Plane Plumes Above a Horizontal Heat Source
Author: Robert George BillPublisher:
ISBN:
Category : Buoyant ascent (Hydrodynamics)
Languages : en
Pages : 142
Book Description
Wind Tunnel Modeling of Plume Rise and Dispersion
Author: Gordon Richard WinkelPublisher:
ISBN:
Category : Air
Languages : en
Pages : 0
Book Description
Experiments were conducted in a wind tunnel to investigate plume rise and plume growth in neutral atmospheric conditions. The modeling of fullscale plumes in the wind tunnel was studied. The use of plume momentum and the flux of buoyancy as scaling criteria proved successful in modeling plume behaviour. If this criteria is used the stack gas density can be varied between model and fullscale to achieve higher wind tunnel speeds with no effect on plume rise or dispersion. The study shows that careful attention must be given in modeling source conditions such as the stack efflux velocity profile due to its strong influence on plume rise and plume spread. The effects of both initial upward stack gas momentum and buoyant forces on plume rise were combined in a single expression that correlated with plume rise data in the wind tunnel. Plume rise was found to terminate at a downwind distance of 2200 L_ , where L is a buoyancy length scale for a plume, for the simulated atmospheric boundary layer shear flow tested. The effect of wind shear in the approach flow reduced plume rise by about 20% as compared to a uniform flow. The theory of Djurfors and Netterville (1978) closely predicted the reduction in plume rise due to wind shear. The Gaussian dispersion model for an elevated point source correctly characterized plume dispersion in the wind tunnel. Freestream velocity at stack height was chosen as a representative plume convection velocity for the Gaussian model. The plume spread due to buoyancy induced turbulence was measured in the wind tunnel and an expression was found to fit the data. Subsequent measurements showed that the interaction of buoyancy induced turbulence and atmospheric turbulence was nonlinear. An appropriate nonlinear correction was developed and successfully corrected for the initial growth due to buoyancy induced turbulence so that the spread due to atmospheric turbulence was recovered.
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 804
Book Description
Experimental Investigation of a Turbulent Reacting Plume
Author: Richard John BrownPublisher:
ISBN:
Category : Nitrogen oxides
Languages : en
Pages : 212
Book Description
Scientific and Technical Aerospace Reports
Author: Air Pollution Abstracts
Author: An Experimental Investigation of Jet Plume Simulation with Solid Circular Cylinders
Author: David Earl ReubushModeling of Plume Rise and Dispersion — The University of Salford Model: U.S.P.R.
Author: Brian Henderson-SellersPublisher: Springer Science & Business Media
ISBN: 3642829767
Category : Technology & Engineering
Languages : en
Pages : 123
Book Description
A Plume-Induced Boundary Layer Separation Experiment
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 18
Book Description
The current paper describes an experimental investigation of a PIBLS flowfield produced by the interaction between two nonparallel, supersonic streams in the presence of a finite thickness base. The purpose of the study is to gain a better understanding of., the extent to which the fluid dynamic mechanisms and interactions present in the PIBLS flowfield influence the turbulence properties of the flow. A two-stream, supersonic wind tunnel, incorporating a two-dimensional planar geometry and operating in the blowdown mode, was specifically designed to produce a PIBLS flowfield. Preliminary experiments have demonstrated that the wind tunnel is capable of producing a wide range of PIBLS flowfields by simply regulating the stagnation pressure of the lower stream (jet flow) relative to the upper stream (freestream flow). One PIBLS flowfield has been chosen in which to conduct a detailed set of measurements. This flowfield has its separation point located about 6 delta 0 upstream of the base corner. A detailed study of this PIBLS flowfield is under way using schlieren photography and shadowgraph pictures, surface streakline visualization, surface static pressure measurements, and two-component, coincident LDV measurements.