Accession Number : AD0690895

Title :   A CORRELATION OF FIELD OBSERVATIONS OF PLUME RISE,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE FLUID MECHANICS LAB

Personal Author(s) : Fay,James A. ; Escudier,Marcel ; Hoult,David P.

Report Date : APR 1969

Pagination or Media Count : 40

Abstract : Data from 137 sets of plume observations, comprising nearly 1500 data points, are correlated with two simple formulae. These formulae, one for the buoyancy-dominated rise region and the other for the stratification-dominated leveled-off region of a plume, represent an approximate form of an entrainment theory for the case of uniform atmospheric stratification and zero wind shear. The two formulae are found to correlate the data equally well over all values of the stack exit and meteorological parameters, provided only that the bulk mean velocity of the stack gases exceeds the mean wind speed by at least 20%. The ratio of observed to calculated plume rise is found to be distributed log normally about the mean value. (Author)

Descriptors :   (*WASTE GASES, AERODYNAMIC CHARACTERISTICS), BUOYANCY, AIR POLLUTION, MOMENTUM, CORRELATION TECHNIQUES, WIND, EQUATIONS OF MOTION, VELOCITY

Subject Categories : Aerodynamics
      Fluid Mechanics
      Air Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE