Author: Carl Hugh Warren
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 124
Book Description
An experimental study was made to determine the quantitative accuracy of the hydraulic analogy when applied to subsonic internal flows such as exist in pure fluid elements. The analogy is based upon the correspondence between density and depth (or pressure and depth squared) when the Mach number and Froude number are equal. Experiments were run in air and in water on geometrically similar nonsymmetrical flow dividers. A factor was used to correct for the difference in apparent specific heat ratios k. (Apparent k = 2 for hydraulic flow, k = 1.4 for air flow.) After this correction was made, the data correlated to within three percent. The Reynolds number for the water flow varied from about 1,500 to 4,000 and, for the air flow, from 17,000 to 100,000. The good correlation, even though some of the water data was taken in apparently laminar flow, indicated that inertial effects predominated over viscous effects. This was because the fluid was essentially at rest before it entered the flow divider. The geometry was characterized by sharp angles and relatively short flow lengths so that convective acceleration and separation zones dominated the flow and established patterns of velocity distribution did not have a chance to completely develop. (Author).
Application of the Hydraulic Analogy to Internal Subsonic Flow
Author: Carl Hugh Warren
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 124
Book Description
An experimental study was made to determine the quantitative accuracy of the hydraulic analogy when applied to subsonic internal flows such as exist in pure fluid elements. The analogy is based upon the correspondence between density and depth (or pressure and depth squared) when the Mach number and Froude number are equal. Experiments were run in air and in water on geometrically similar nonsymmetrical flow dividers. A factor was used to correct for the difference in apparent specific heat ratios k. (Apparent k = 2 for hydraulic flow, k = 1.4 for air flow.) After this correction was made, the data correlated to within three percent. The Reynolds number for the water flow varied from about 1,500 to 4,000 and, for the air flow, from 17,000 to 100,000. The good correlation, even though some of the water data was taken in apparently laminar flow, indicated that inertial effects predominated over viscous effects. This was because the fluid was essentially at rest before it entered the flow divider. The geometry was characterized by sharp angles and relatively short flow lengths so that convective acceleration and separation zones dominated the flow and established patterns of velocity distribution did not have a chance to completely develop. (Author).
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 124
Book Description
An experimental study was made to determine the quantitative accuracy of the hydraulic analogy when applied to subsonic internal flows such as exist in pure fluid elements. The analogy is based upon the correspondence between density and depth (or pressure and depth squared) when the Mach number and Froude number are equal. Experiments were run in air and in water on geometrically similar nonsymmetrical flow dividers. A factor was used to correct for the difference in apparent specific heat ratios k. (Apparent k = 2 for hydraulic flow, k = 1.4 for air flow.) After this correction was made, the data correlated to within three percent. The Reynolds number for the water flow varied from about 1,500 to 4,000 and, for the air flow, from 17,000 to 100,000. The good correlation, even though some of the water data was taken in apparently laminar flow, indicated that inertial effects predominated over viscous effects. This was because the fluid was essentially at rest before it entered the flow divider. The geometry was characterized by sharp angles and relatively short flow lengths so that convective acceleration and separation zones dominated the flow and established patterns of velocity distribution did not have a chance to completely develop. (Author).
Hydraulic Research in the United States 1968
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 342
Book Description
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 342
Book Description
Current Hydraulic Laboratory Research in the United States
Author:
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 334
Book Description
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 334
Book Description
Hydraulic Research in the United States and Canada
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 1046
Book Description
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 1046
Book Description
Report
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 696
Book Description
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 696
Book Description
NBS Special Publication
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 1152
Book Description
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 1152
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 590
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 590
Book Description
Technical Abstract Bulletin
Government-wide Index to Federal Research & Development Reports
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1352
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1352
Book Description
The Application of the Hydraulic Analogy to Certain Atmospheric Flow Problems
Author: Morris Tepper
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 60
Book Description
In the summary, suggestions are made relative to the inclusive of the theory discussed in this paper in the day-to-day analysis of the weather. Indications are also given for the extension of the hydraulic analogy beyond the point covered in this paper.
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 60
Book Description
In the summary, suggestions are made relative to the inclusive of the theory discussed in this paper in the day-to-day analysis of the weather. Indications are also given for the extension of the hydraulic analogy beyond the point covered in this paper.