Cross-flow set up
The cross-flow set up mainly consists of a settling chamber, flow straighteners (honeycomb structure), a test section, air supply system and fuel supply system. Air is supplied perpendicular to the axis of the cylindrical settling chamber G through the path A-B-C-D. Rotameter used for air has been pre-calibrated for the required range of volumetric flow rate. The settling chamber has been constructed using mild steel and is of diameter 200 mm. It consists of a chamber of length 150 mm, to which the air is supplied, and another of length 300 mm. The chamber having a length of 300 mm facilitates the flow development and ensures a steady uniform flow at the exit of it and into the test chamber. To ensure uniform and unidirectional flow of air into the test section, a honeycomb flow straightener is present just before the exit of this chamber. Porous block is made of pressed glass wool. It has a length of 70 mm, width of 19mm and depth of 10 mm. Fuel mixture enters the test section uniformly with the desired volumetric flow rate (or an average velocity).
Schematic of the cross-flow setup with the details of the obstacles and the fuel injector
Faculty incharge:
Dr. V. Raghavan