Development of Improved Methods for Simulating Aircraft Inlet Distortion in Turbine Engine Ground Tests (Invited)

A review is presented of recent experimental results, analytical procedures and test techniques employed to evaluate the effects of inlet flow distortion on the stability characteristics of representative afterburning turbofan and turbojet compression systems. Circumferential distortions of pressure and temperature, separately and in combination are considered. Resulting engine sensitivity measurements are compared with predictions based on simplified parallel compressor models and with several distortion descriptor parameters.

/pdf/summary-of-recent-investigations-of-inlet-flow-distortion-ept1wx0zat.pdf

Summary of recent investigations of inlet flow distortion effect on engine stability

Numerical investigation of a compact tube heat exchanger for hypersonic pre-cooled aero-engine

Improving information productivity and quality in turbine engine ground testing

A survey is presented of experimental and analytical experience of the NASA Lewis Research Center in engine response to inlet temperature and pressure distortions. This includes a description of the hardware and techniques employed, and a summary of the highlights of experimental investigations and analytical modeling. Distortion devices successfully simulated inlet distortion, and knowledge was gained about compression system response to different types of distortion. A list of NASA research references is included.

Summary of investigations of engine response to distorted inlet conditions

Turbofan engine compressor system performance dependence on circumferential extent, magnitude and rate of change of inlet temperature in altitude test facility

/pdf/the-effect-of-inlet-temperature-distortion-on-the-4qenxneyp7.pdf

R. J. Antl

Papers

The effect of inlet temperature distortion on the performance of a turbo-fan engine compressor system