b'Engineer Innovation | Automotive & TransportationLegend: Tests temperature/Simulation temperatureTests (IR) CalculationsFigure 8: Temperature field on water tubes, air outlet side Figure 9: Air temperature at LCAC outletConfiguration P_air tests [kW] Gain/steady P_air CFD [kW] Gap CFD/test Test meansSteady 8.94 - 8.95 0% The LCAC was tested in a straight channel for steady state correlation. 1000RPM 9.15 2.3% 9.15 0% The unsteady condition being a 3000RPM 9.27 3.7% 9.1 -1.8% rotating cylinder with openings set up at the LCAC outlet (figure 4) allowing Figure 10: Heat exchanges under dynamic flow the sequential opening and closing of the three runners simulating the operation of a 3-cylinder engine. A team at the Femto-st Institute implemented a particle imagery velocimetry (PIV) system (figure 5), infrared camera and hot wire anemometer in addition to other sensors to get detailed pictures of the flow and temperature distribution.Simulating stationary conditionsVelocity (m/s) The injection of the relationship HTC=f(Re,Pr) into the phasic porous media model resulted in a variation of H / X = 15.1mm the HTC inside the LCAC (figure 6) 0 Phase = 115 resulting in a non-uniform temperature -10 distribution at the heat exchanger outlet. -20Z mmThe results have been compared to -30test, and the following conclusions -40 have been made:-50 C11 C22 C33The heat exchanges are the same 0255075100125150175 (figure 7)Y mm The temperature profile of the Figure 11: CFD vs. PIV: tangential components of the velocity in a horizontal plane at 3000RPM external sides of the water channels look the same when comparing CFD calculations and the infrared camera image (figure 8). The first and last fin rows have higher temperatures as a result of the contact with only one coolant plate and the parabolic shapes at the coolant inlet side (right side) are similar. The air temperature of five sensors at LCAC outlet are very close (figure 9)68'