An investigation of the aerodynamic and ventilation characteristics of poultry transport vehicles .2. Wind tunnel experiments

This is the second part of a three part paper that reports the results of an investigation into the aerodynamic and ventilation characteristics of poultry transport vehicles. In Part 1 the results of full scale aerodynamic measurements were described. In this paper the results of an extensive series of wind tunnel effects are described and discussed, and in Part 3 a method of calculating internal flow conditions is set out, and a comparison made between the results of this method and full scale internal environmental measurements. In this paper results are presented for the pressure distributions around a poultry transport vehicle over a wide yaw and flow range, together with some measurement of the external vehicle flow field and some flow visualisation at zero yaw. A comparison with the full scale measurements of Part 1 suggest that the model scale data is reasonably accurate, except near the front of the vehicle where extensive flow separation occurs. Overall, it is concluded that the results are adequate for use as boundary conditions in the calculation method set out in Part 3. (C) 1996 Silsoe Research Institute.