Abstract:

In an aircraft, ambient air is directed via ram air channels or NACA channels for a variety of uses, including pressurising the cabin, cooling heat exchangers, and other uses like cooling coolant. Even aerodynamical aspects ought to be taken into consideration during design to guarantee that it supplies the required quantity of ambient air for the various activities that have been described. In the past, it was common practice to first design built prototypes, then carry out experiments to improve the design and provide forecasts that were accurate and easy to understand. Before finishing the prototype, certain new mathematical approaches were added in an effort to prevent the use of these methods, which may result in significant resource and time loss and increase the likelihood of receiving the erroneous results. Prior to the prototype stage, the calculation stage includes a few more processes, namely computer-aided simulations. These simulations may approach the accuracy rate required before the prototype stage and can be as exact as real-time simulations. The goal is to create a Ram air channel tool chain that increases flow and delivers the heated refrigerant from the avionics systems to heat exchangers to cool it. The applications for which the heat exchanger is used and the temperature range that needs to be cooled determine its specifications. The Ram air channel's shape is designed in CAD to maintain the required mass flow rate for the heat exchanger's performance after first estimating the heat exchanger's size for the required performance. In order for the final model to achieve flow optimization for a heat exchanger, these two components are finally incorporated into the simulation loop.

Description:

NACA, CAD, Ram air channel, aerodynamical