Theory of the Hydraulic Analogy for Steady and Unsteady Gas Dynamics

1969 ◽  
pp. 1-61
Author(s):  
W. H. T. Loh
Keyword(s):  
Gas Dynamics ◽  
Hydraulic Analogy

The Size of Aerofoil Models for Quantitative Hydraulic Analogy Research

1956 ◽  
Vol 60 (543) ◽  
pp. 208-209
Author(s):  
R. A. A. Bryant
Keyword(s):  
Water Flow ◽  
Gas Dynamics ◽  
Recent Article ◽  
Gas Flow ◽  
Three Dimensional ◽  
Quantitative Investigation ◽  
Inviscid Gas ◽  
Small Incidence ◽  
Hydraulic Analogy ◽  
Physical Analogy

In a recent article Lundberg has made reference to use of the “ Hydraulic Analogy ” for quantitative investigation of gas dynamics phenomena. This is quite feasible provided that the basic analogy and its limitations are properly understood. In fact, considerable progress has already been made and it has been proved possible to utilise the analogy for both supersonic and transonic research.A study of the mathematical analogy indicates that the strongest physical analogy between a two-dimensional (inviscid) gas flow and a three-dimensional (viscous) water flow exists for the transonic case when the water depth is approximately one quarter inch and the model is towed. Only thin profiles with small incidence can be sensibly investigated. Under such conditions the analogous water flow may be considered as a distorted dissimilar model of a corresponding prototype gas flow.

Supernovae and interstellar gas dynamics

1967 ◽  
Vol 31 ◽  
pp. 117-119
Author(s):  
F. D. Kahn ◽  
L. Woltjer
Keyword(s):  
Lower Limit ◽  
High Velocity ◽  
Gas Dynamics ◽  
Interstellar Cloud ◽  
Interstellar Gas ◽  
Random Motions ◽  
Relativistic Particles

The efficiency of the transfer of energy from supernovae into interstellar cloud motions is investigated. A lower limit of about 0·002 is obtained, but values near 0·01 are more likely. Taking all uncertainties in the theory and observations into account, the energy per supernova, in the form of relativistic particles or high-velocity matter, needed to maintain the random motions in the interstellar gas is estimated as 1051·4±1ergs.

A Hydraulic Analogy of Radiation

1907 ◽  
Vol 63 (1639supp) ◽  
pp. 26263-26264
Keyword(s):  
Hydraulic Analogy
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