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 characterist ics 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 discusse d, and in Part 3 a method of calculating internal flow conditions is s et out, and a comparison made between the results of this method and f ull scale internal environmental measurements. In this paper results a re presented for the pressure distributions around a poultry transport vehicle over a wide yaw and flow range, together with some measuremen t of the external vehicle flow field and some flow visualisation at ze ro yaw. A comparison with the full scale measurements of Part 1 sugges t that the model scale data is reasonably accurate, except near the fr ont of the vehicle where extensive flow separation occurs. Overall, it is concluded that the results are adequate for use as boundary condit ions in the calculation method set out in Part 3. (C) 1996 Silsoe Rese arch Institute.