An Assessment of Factors Affecting Prediction of Near-Field Development of a Subsonic VSTOL Jet in Cross-Flow.

1982 ◽  
Author(s):  
A. J. Baker ◽  
J. A. Orzechowski
Keyword(s):  
Near Field ◽  
Cross Flow ◽  
Factors Affecting ◽  
Field Development ◽  
Jet In Cross Flow

The structure of turbulent jets

1980 ◽  
Vol 370 (1742) ◽  
pp. 281-301 ◽  
Keyword(s):  
Pressure Field ◽  
Near Field ◽  
Three Dimensional ◽  
Cross Flow ◽  
Research Programme ◽  
Turbulent Jets ◽  
Jet Flows ◽  
Turbulence Structure ◽  
Confined Jets ◽  
Jet In Cross Flow

On the basis of available measurements, it is shown that different mechanisms may exert control in different jet flows or in different regions of a jet flow. In unconfined two-dimensional jets the downstream region is dominated by turbulence structure whereas coherent eddies can have a strong influence on the near field if the Reynolds number is low. The pressure field is significant in confined jets and is of major importance for a round jet in cross flow. As a consequence, it is necessary to identify the structures of importance before undertaking a major research programme. Calculation methods, based on the numerical solution of time-averaged conservation equations in differential form, involve closure assumptions and are necessarily approximate. In the far field of an unconfined jet, the representation of the turbulence structure is of major importance and the usual assumptions appear to lead, for example, to overestimation of the growth rate by around 20 %; this deficiency can be of lesser significance in many practical jet configurations. In three-dimensional jet flows, where turbulence structure may be less important, available computer facilities can control the calculated results and render it difficult to quantify the corresponding precision.

Large Eddy Simulation of a Supercritical Fuel Jet in Cross Flow using GPU-Acceleration

2016 ◽  
Author(s):  
Kalyana C. Gottiparthi ◽  
Ramanan Sankaran ◽  
Anthony M. Ruiz ◽  
Guilhem Lacaze ◽  
Joseph C. Oefelein
Keyword(s):  
Large Eddy Simulation ◽  
Cross Flow ◽  
Gpu Acceleration ◽  
Eddy Simulation ◽  
Jet In Cross Flow ◽  
Fuel Jet ◽  
Large Eddy

scholarly journals Datum ranking and analysis of factors affecting tire wear

2020 ◽  
Vol 1 (1) ◽  
pp. 164-169
Author(s):  
El’dar Kamil’evich ABDULAEV ◽  
Keyword(s):  
Production Management ◽  
Economic Effect ◽  
Technical Condition ◽  
Transport Costs ◽  
Factors Affecting ◽  
Field Development ◽  
Dump Trucks ◽  
Tire Production ◽  
Main Factors ◽  
And Performance

Relevance of the work. The operational efficiency and technical condition of mining vehicles to a large extent depend on the service life and performance characteristics of tires. The most important technological process that determines the effectiveness of field development is the transportation of rock mass. The share of motor transport costs in the total cost and production by open method at Russian mining enterprises is significant, and reaches 70% as the depth of open pits (cuts) increases. At the same time, the actual productivity of mining trucks is much lower than their technical and technological capabilities, and this difference is up to 2.5 times or more for various brands of vehicles, including imported ones. Today, both consumers and manufacturers of large tires are interested in the most efficient tire production management. Purpose of the work: consideration of the main factors affecting tyre life, as well as datum ranking of these factors to determine the degree of significance of each factor. Methodology of research. The systematic approach was used including datum ranking method, some analytical, computational methods and generalization. Results. The ranking was carried out by three independent groups of experts on a number of proposed factors. The main factors in each group were identified and the degree of agreement between the opinions of the interviewed specialists was evaluated. The general opinion of various expert groups on the significance and ranking of factors affecting the integrity of giant tires is confirmed. Conclusions. Datum ranking and analysis of factors affecting the wear of giant tires of mining dump trucks significantly affect the optimization of machine operation and, with appropriate adjustments, can give a positive economic effect.

Flow structure of the plane turbulent impinging jet in cross flow

2001 ◽  
Vol 39 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Meilan Qi ◽  
Zhicong Chen ◽  
Renshou Fu
Keyword(s):  
Flow Structure ◽  
Cross Flow ◽  
Impinging Jet ◽  
Jet In Cross Flow

A Visual Study of a Round Jet in Cross-Flow

1992 ◽  
pp. 173-177
Author(s):  
R. M. Kelso ◽  
T. T. Lim ◽  
A. E. Perry
Keyword(s):  
Cross Flow ◽  
Round Jet ◽  
Visual Study ◽  
Jet In Cross Flow
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