This research discusses developing an Euler turbine-based hybrid mesh turbomachinery. Within the framework of mechanical engineering science, turbomachinery classification and a novel method for design were considered. In such turbomachine, large blades are replaced by set smaller blades, which interconnected to form flow channels in structure. Previous studies (and reasoning within inductive d...

In this opening lecture I will summarize some of the fundamentals of cavitation in the hope that this will allow attendees greater insight into the more advanced lectures which follow. Whether your primary interest is in the turbomachinery field or in the biological and bioengineering contexts in which cavitation is important these fundamentals are important in understanding the observed phenom...

Time-periodic CFD simulations are widely used to investigate turbomachinery components. The triple-plane pressure mode matching method (TPP) developed by Ovenden and Rienstra extracts the acoustic part in such simulations. Experience shows that this method is subject to significant errors when the amplitude of pseudo-sound is high compared to sound. Pseudo-sound are unsteady pressure fluctuatio...

Vortical and shear flows are common in turbomachinery. Multi-hole pressure probes used turbomachinery order to provide robust accurate measurements of both velocity components. In this study, two different miniature five-hole designed fabricated, with a cobra shape. The probe tip was 1.45 mm it maintained that size for the length shape formation, providing very close proximity solid boundaries ...

An artificial dissipation scheme using the concepts of SLIP and CUSP is implemented on top of a baseline three-dimensional turbomachinery flow code. The original baseline code uses a finite-volume method for the Navier-Stokes equations with classical Jameson-Schmidt-Turkel(JST) scalar dissipation scheme. This paper focuses on the comparison of the performance of the CUSP scheme with the origina...

For advanced aerospace propulsion systems, development of ceramic matrix composite integrally-bladed turbine disk technology is attractive for a number of reasons. The high strength-to-weight ratio of ceramic composites helps to reduce engine weight and the onepiece construction of a blisk will result in fewer parts count, which should translate into reduced operational costs. One shortcoming w...

among 14,102 patients admitted in teaching hospitals of the isfahan medical school, whose records were studied, 2,122 or 15.4% of patients had high blood pressure. the most common reason for blood pressure in this group was diseases of the kidney and for those, glomerolonephritis and pilonephrititis were important causes. among patients under 30 years old, high blood pressure was twice as commo...

Fretting is a structural damage mechanism arising between two nominally clamped surfaces subjected to an oscillatory loading. A critical location for fretting induced darnage has been identified at the blade/disk and blade/damper interfaces of gas turbine engine turbomachinery and space propulsion components. The hightemperature, high-frequency loading environment seen by these components lead ...