The pressure velocity correlation in reactive turbulent flows
Abstract
Analysis is made of the oftenneglected correlation between velocity and pressure gradient fluctuations which occurs in the turbulent kinetic energy equation (TKEE). Restricting attention to this correlation for normal turbulent flames in premixed gases using high activation energy asymptotics, a model is generated for the correlation. Splitting the velocity field into solenoidal and irrotational components, it is shown that the acoustic field can dominate the vortical field under several circumstances, in which case the TKEE is not a turbulence equation but an acoustic equation. Under conditions where the vortical field is dominant the pressurevelocity correlation is shown to be essential to the TKE balance.
 Publication:

AIAA, Aerospace Sciences Meeting
 Pub Date:
 January 1981
 Bibcode:
 1981aiaa.meetW....S
 Keywords:

 Combustible Flow;
 Flow Velocity;
 Numerical Flow Visualization;
 Premixed Flames;
 Pressure Gradients;
 Turbulent Flow;
 Velocity Distribution;
 Chemical Reactions;
 Combustion Chambers;
 Conservation Equations;
 Correlation;
 Kinetic Equations;
 Vertical Distribution;
 Fluid Mechanics and Heat Transfer