Download Free Design Properties Of High Strength Steels In The Presence Of Stress Concentrations Book in PDF and EPUB Free Download. You can read online Design Properties Of High Strength Steels In The Presence Of Stress Concentrations and write the review.

Two hundred and seventy (270) technical reports and technical notes written during the period 1 July 1956 - 30 June 1957 are abstracted. These reports cover the following areas of research: adhesives, metallurgy, analysis and measurement, biochemistry, textiles, petroleum products, plastics, packaging, protective treatments and rubber. A contractor index, investigator index, and a numerical index of all the technical reports issued during the period March 1923 - June 1957 are provided.
Several noise suppressors consisting of combinations of mixing nozzles and ejectors were tested on two full-scale turbojet engines. Maximum sound pressure level reductions of 12 decibels and sound power level reductions of 8 decibels were obtained. The ejectors provided 3 to 5 decibels of the sound power reduction. The effects of ejector dimensions on noise suppression and engine performance were investigated. Ejector lengths of approximately 2.0 standard nozzle diameters and ejector diameters larger than 1.6 standard nozzle diameters provided the greatest additional noise reduction to that obtained with the mixing nozzles alone. The ejector can restore the static thrust loss caused by use of the mixing nozzle or can provide static-thrust augmentation.