Sec. X3.8 



MECHANICAL PROPERTIES OF AIR AND WATER 



923 



in the mechanical properties of air at atmospheric 

 pressure and at sea level, depending upon what 

 source is consulted. A. H. Shapiro, in Volume I 

 of his book "Compressible Fluid Flow," 1953, 

 pages 612-613, gives the following principal data, 

 to which supplementary data have been added: 



Height above sea level, h 

 Temperature, T 

 Speed of sound, c 

 Pressure, p 



Mass density, p 

 Weight density, w 

 Coefficient of viscosity, ^x 



Kinematic viscosity, v 



Oft 



59 deg F, 15 deg C 

 1,117 ft per sec 

 2,116.2 lb per ft' 



- 14.696 psi 



- 29.91 inches of 

 Hg 



o 759.7 mm. of Hg 

 0.002378 slugs per ft' 

 0.0765 lb per ft' 

 3.719(10"') slugs per 



ft-sec 

 1.564(10"") ft^ per 



sec. 



Corresponding data for air, over a range of 

 temperature from deg F to 200 deg F, are 

 listed in Table X3.n. 



For possible use in wind-resistance calculations, 

 as well as for the design of stacks and other 

 outlets to carry exhaust gases and products of 



TABLE X3.m — Bulk Modulus of Elasticity of Fresh 

 AND Salt Water at Atmospheric Pressure 

 The data are taken from H. Rouse [EMF, 1946, p. 364], 

 except that the value of K for fresh water at 100 deg F is 

 increased to 332,000 to agree with a faired curve of these 

 values. The X-value for 59 deg F, 15 deg C, is interpolated 

 from this curve. 



combustion free of the \Vorking and living spaces 

 on a ship. Table X3.o gives the mechanical 

 properties of a typical combustion gas for a 

 rather wide range of temperature. 



TABLE XS.n^MECHANiCAL Properties of Air at 

 Atmospheric Pressure 

 The data given here are taken from H. Rouse [EMF, 

 1946, Appendix, Table X, p. 363], with a change to ITTC 

 1951 symbols. 



TABLE X3.0 — Mechanical Properties of Stack 



AND Exhaust Gases 

 The composition of the typical gas is described in the 

 text. 



*The numbers marked with interrogation points are 

 doubtful. 



