Choon S. Tan

TL;DR: In this paper, a computational study to define the phenomena that lead to the onset of short length-scale (spike) rotating stall disturbances has been carried out based on unsteady simulations.

TL;DR: In this paper, the authors present a general nomenclature of streamwise vorticity and three-dimensional flow in fluid components, including boundary layers, free shear layers, and flow with heat addition.

TL;DR: In this paper, the influence of three-dimensional flow structures within a compressor blade passage has been examined computationally to determine their role in rotating stall inception, and the results showed a short length-scale (or spike) type of stall inception similar to that seen in experiments; to the best of our knowledge this is the first time such a feature has been simulated.

Abstract: MIT is developing a MEMS-based gas turbine generator. Based on high speed rotating machinery, this 1 cm diameter by 3 mm thick SiC heat engine is designed to produce 10-20 W of electric power while consuming 10 grams/hr of H/sub 2/. Later versions may produce up to 100 W using hydrocarbon fuels. The combustor is now operating and an 80 W micro-turbine has been fabricated and is being tested. This engine can be considered the first of a new class of MEMS device, power MEMS, which are heat engines operating at power densities similar to those of the best large scale devices made today.

TL;DR: In this article, a new methodology for quantifying compressor endwall blockage and an approach, using this quantification, for defining the links between design parameters, flow conditions, and the growth of blockage due to tip clearance flow is presented.