Numerical simulation and experimental verification of influence of air duct structure on thermal environment in artificial environment laboratories

Designs ten kinds of structures for an artificial environment laboratory with sidewall air supply and upper return air from three aspects of the supply air duct, return air duct and supply and return air plenum space, and simulates temperature and velocity fields. Verifies the simulation results of the typical structures by tests. Adopts a uniformity coefficient to evaluate the different structures. The results show that the optimal structure of single supply air plenum space, single return air plenum space, supply air duct with 60° slope and flat top return air duct is satisfied. Recommends the wind speed range of 2 to 6 m/s.