IMPACT CHARACTERISTICS OF HAILSTONES SIMULATING INGESTION BY TURBOFANAEROENGINES

To study hail ingestion of turbofan engines, it is essential to have a n understanding about the impact of hailstones upon a solid surface. B asic ice impact characteristics In terms of postimpact particle size, velocity, and mass distribution were studied experimentally with simul ated hailstones. Two techniques were used, i.e., patternator and still photography. The advantages and disadvantages of each technique are d iscussed and the results from each technique presented. A parametric s tudy was carried out, and the parameters investigated included impact angle, approach speed, and Initial size of the simulated hailstones. B ased on the experimental results, a set of empirical rules is defined for the basic disintegration characteristics of simulated hailstones u pon impact.