U.S. Standard Atmosphere, 1976United States. National Oceanic and Atmospheric Administration, United States Committee on Extension to the Standard Atmosphere National Oceanic and Amospheric [sic] Administration, 1976 - 227 pages |
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Page 17 - ... PARTICLE SPEED, m/s 2000 Figure 10. Mean air-particle speed versus geometric altitude. where a is the effective collision diameter of the mean air molecules. The adopted value of a, that is, 3.65 X 10"10 m is suitable for that part of the atmosphere below about 86 km, which is dominated by N2 and O2 . Above this height, the value of a, which depends upon composition in a complicated manner, begins to change significantly so that tabulations with four significant figures are no longer valid. At...
Page 4 - T' be what they become when the compression is concluded. Then if k denote the ratio of the specific heat of air at constant pressure to the specific heat of air...
Page 19 - The coefficient of viscosity is defined as a coefficient of internal friction developed where gas regions move adjacent to each other at different velocities. The following expression, basically from kinetic theory, but with 90 60 70 1 О о 260 270 280 290 300 310 320 330 340 Sound speed, m sec
Page 17 - For a valid average to occur, there must be a sufficient number of particles involved to represent mean conditions. Pressure and temperature gradients within the volume must also be negligible. The analytical expression for V is closely related to that for the speed of sound, and is proportional to the ratio T/M.
Page 12 - For Z equal to 86 km and above the value of pressure is computed as a function of geometric altitude, Z, and involves the altitude profile of kinetic temperature...
Page 49 - A one- or two-digit number (preceded by a plus or minus sign) following the initial entry of each block indicates the power of ten by which that entry and each succeeding entry of that block should be multiplied.
Page 46 - Dams, R. , Robbins, JA, Rahn, KA, and Winchester, JW 1970. Nondestructive Neutron Activation Analysis of Air Pollution Particulates, Anal.