Accession Number : AD0774275

Title :   High-Velocity Liquid Impact Damage.

Descriptive Note : Progress rept.,

Corporate Author : TENNESSEE TECHNOLOGICAL UNIV COOKEVILLE DEPT OF ENGINEERING SCIENCE

Personal Author(s) : Kinslow,Ray ; Smith,Dallas G. ; Sahai,Vireshwar

Report Date : JAN 1974

Pagination or Media Count : 104

Abstract : Rain erosion poses a serious threat to the structural integrity and the electromagnetic performance of ceramic radomes. This progress report outlines some of the research directed toward an understanding of the mechanics of rain erosion of materials traveling at supersonic speeds. A jet gun capable of accelerating short jets of water to speeds of 5000 ft/sec is described. The volumes of craters in slip-cast fused silica targets are found to vary with the 1.44 power of the kinetic energy of the impinging jet. The pressure distribution across the impacted area of the target has been measured and found to approximate a normal Gaussian distribution with the maximum pressure at the center being equal to about 90% of the water-hammer pressure. Oblique and multiple impacts, stress waves, and spallation are discussed. (Author)

Descriptors :   *Rain erosion, *Radomes, *Ceramic materials, Raindrops, High velocity, Impact, Liquid jets, Models, Cratering, Stresses, Simulation, Fracture(Mechanics), Spallation, Nozzles, Stainless steel, Silicon dioxide, High velocity, Pressure

Subject Categories : Aircraft
      Ceramics, Refractories and Glass
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE