Integrating CFD and Experiment: The Jaguar Land Rover Aeroacoustics Process C. M. Freeman* and A. P. Gaylard  Jaguar Land Rover, Wind Noise* and Aerodynamics  ABSTRACT In the premium sector of the automotive market the reduction of wind generated noise is becoming ever more important. At Jaguar Land Rover we are currently developing an integrated CAE and experimental aeroacoustic process. This paper describes the process using the new Jaguar XF as an example. The process starts with CFD simulations, using a Lattice Boltzmann CFD code (Exa PowerFLOW TM ). Next, a flow structure assessment is made. As an example, visualisation data is provided on an XF at the MIRA Full Scale Wind Tunnel, along with the output of CFD simulations. Following this, aeroacoustic testing is carried out at the Pininfarina and Ford of Europe AWTs. This includes acoustic mirror, acoustic head, beamforming, GRAS and B&K surface microphone measurements. Lessons are drawn on integrating CFD and experimental techniques into the development process. 1. INTRODUCTION In this paper the Jaguar Land Rover (JLR) aeroacoustic development process is introduced. This involves both CAE and experimental methodologies and tracks utilisation of each of the tools in line with the development of the car though the major program gateways. They are also used for program specific competitor benchmarking. The methodologies discussed include CFD, surface flow visualisation, surface microphones, acoustic mirror and beamforming. Figure 1 JLR aeroacoustic process flow chart Techniques <Pre-PS> Pre program start <PS> Program start <PSC> Program strategy confirmed <FAA> Final appearance approval <FDJ> Final data judgement <VP> Verification prototype CFD Theme selection Design iteration assessment Final assessment SEA Design iteration assessment Final assessment Achievement vs prediction Flow Visualisation Flow Vis Surface microphones Design iteration assessment Final assessment Achievement vs prediction Acoustic mirror Design iteration assessment Acoustic Heads AH level achieved Beam- forming ‘aerobuck’ checks Initial design Final assessment Achievement vs prediction