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Author: Publisher:
ISBN:
Category : Jet (Precious stone)
Languages : en
Pages : 61
Book Description
Analysis of Injection of Heated Turbulent Jet Into Cross Flow [with List of References]
![Analysis of Injection of Heated Turbulent Jet Into Cross Flow [with List of References] PDF](https://books.google.com/books/content/images/frontcover/oCAUtAEACAAJ?fife=w80-h100)
Author: Analysis of the Injection of a Heated Turbulent Jet Into a Cross Flow
Author: James Franklin CampbellPublisher:
ISBN:
Category : Jets
Languages : en
Pages : 70
Book Description
An investigation has been undertaken to develop a theoretical model of the incompressible jet injection process. The discharge of a turbulent jet into a cross flow was mathematically modeled by using an integral method which accounts for natural fluid mechanisms such as turbulence, entrainment, buoyancy, and heat transfer. The analytical results are supported by experimental data and demonstrate the usefulness of the theory for estimating the trajectory and flow properties of the jet for a variety of injection conditions. The capability of predicting jet flow properties, as well as two- and three- dimensional jet paths, was enhanced by obtaining the jet cross-sectional area during the solution of the conservation equations (a number of previous studies assume a specific growth for the area). Realistic estimates of temperature in the jet fluid were acquired by accounting for heat losses in the jet flow due to forced convection and to entrainment of free-stream fluid into the jet.
Analysis of the Injection of a Heated, Turbulent Jet Into a Moving Mainstream
Author: James Franklin CampbellPublisher:
ISBN:
Category : Thermal pollution of rivers, lakes, etc
Languages : en
Pages : 202
Book Description
Tracings: 75.80, 94.51.
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1570
Book Description
Manipulation and Control of Jets in Crossflow
Author: Ann R. KaragozianPublisher: Springer Science & Business Media
ISBN: 9783211007532
Category : Technology & Engineering
Languages : en
Pages : 320
Book Description
Fundamental Non-Reactive Jets in Crossflow and Other Jet Systems; Background on Modeling, Dynamical Systems, and Control; Reactive Jets in Crossflow and Multiphase Jets; Controlled Jets in Crossflow and Control via Jet Systems;
Entrainment Processes for a Jet in Cross-Flow
Author: Publisher:
ISBN:
Category : Jets
Languages : en
Pages : 193
Book Description
A jet in cross flow (JICF) is examined experimentally by injecting a stream of air into crossing fluid with an aim into quantifying entrainment process and downstream evolution. The behavior of JICF is important to fields ranging from turbine-blade cooling to smokestack pollution and volcanic eruption dynamics. Existing simplified volcanic plume models are tested; most importantly, the near-field contributions of complex interconnected vortex systems, which present significant uncertainties because they assume negligible turbulence. While jets in irrotational cross-flow have been investigated, this analysis has focused on the interaction between a turbulent jet in low and highly turbulent cross-flow created by an active grid. Instantaneous velocity fields were collected over seven planes using particle image velocimetry (PIV). A center-plane (x-y) and six planes parallel to the floor (x-z) highlight the interaction and resulting vortex systems. Various jet-to-cross-flow velocity ratios, Rv, were collected for each plane, which allow for computation of mean statistics and Reynolds stresses. Analysis was focused in five stages: a) identification of differences in the development of the jet across various inflow conditions, b) analysis of the vortex systems through transport and critical points analysis, c) decomposition of the flow structures to identify and remove the highest-order contributions to turbulence kinetic energy and d) extraction of reduced order modeling closure terms and e) optimization of closure terms for the simplified one-dimensional model, Plumeria. These five stages provided a comprehensive description of the role of cross-flow turbulence on the development of JICF. Noteworthy findings include significant changes in wake recovery and the near-wake recirculation region that impacted near-field entrainment; increased entrainment for high cross-flow turbulence after the collapse of the potential core due to increased engulfment and viscous nibbling between turbulent fluids; the presence of shear layer and wake vortices through critical point analysis; and the absence of entrainment and shear layer expansion near the exit. Most importantly, the negligible entrainment near the exit and impact of small scale turbulent features that must be included for any specific model to yield reasonable predictions is highlighted. By laying the foundation for a more nuanced approach to JICF, it is possible to more precisely summarize the complex features observed in this work through simplified descriptions that can be of benefit to both engineering design and geophysical modeling.
Numerical Prediction of the Statistical Properties of Heated Turbulent Air Jets in a Cross-flow
Author: Wenyan NiPublisher:
ISBN: 9780315972384
Category :
Languages : en
Pages : 292
Book Description
ASME Technical Papers
Author: Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 590
Book Description
Paper
Author: Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 592
Book Description
Experiments on Confined Turbulent Jets in Cross Flow
Author: Yasuhiro KamotaniPublisher:
ISBN:
Category : Eddies
Languages : en
Pages : 84
Book Description