IMPROVEMENT OF UNEVEN DISTRIBUTION OF OUTLET AIR FLOW RATES FROM SHALLOW AIR PLENUM

摘要

The measurements in a mock-up of the underfloor air distribution system with a pressurized shallow air plenum have revealed that a vortex or unidirectional air flow around the outlet causes the outlet air flow rate to be less than predicted. However, this can be improved by guide plates sset around the outlet. Numerical simulation was carried out, and its results were good, only when the legs supporting the floor panels were included in the mesh-dividing process. The calculated distribution of outlet air flow rate was given practical accuracy through the adjusting procedure derived from the experimental analysis.