This work presents a comparison of thin film gauge (TFG) and infrared (IR) thermography measurement techniques to simultaneously determine heat transfer coefficient and film cooling effectiveness. The first comparison was with an uncooled vane where heat transfer coefficient was measured at Mex=0.77 and Tu=16%. Relatively good agreement was found between the results of the two methods and the e...

Micro (0.5–10 kW) organic Rankine cycle (ORC) power systems are nowadays considered for domestic power generation. Selection of a suitable expander is one of the most important problems connected with the domestic ORC system design. Volumetric machines or micro-turbines can be adopted as an expander in domestic ORC systems. Scroll and screw expanders are a common choice and were successfully ap...

Lowry, 0. H., Rosebrough, N. J., Farr, A. L. & Randall, R. J. (195 1) J. Biol. Chem. 193,265-275 MacDermot, J., Higashida, H., Wilson, S. P., Matsuzawa, H., Minna, J. & Nirenberg, M. (1979) Proc. Natl. Acad. Sci. USA. 76, 11351139 Minna, J. D., Yavelow, 1. & Coon, H. G. (1975) Genetics (Suppl.) 79, 373-383 Moncada, S., Gryglewski, R. J., Bunting, S. & Vane, J. R. (1976) Nature (London) 263,663-...

This paper presents a computational study on the aerodynamic effectiveness of vane-type fan-flow deflectors used for reducing jet noise from a supersonic turbofan exhaust with bypass ratio of 2.7. The numerical code solved the three-dimensional Reynolds-averaged Navier–Stokes equations. A series of nozzle configurations using deflector vanes of variable number, airfoil section, azimuthal mounti...

This paper presents the design, implementation and evaluation of an instrumentation system for the stability monitoring and characterization of combustion flames. The system, incorporating optical sensing, image processing and spectral analysis techniques, is designed to monitor a range of flame characteristic parameters. The stability of the flame is assessed through statistical analysis of th...

The Feynman-Smoluchowski Engine (FSE) is simply a ratchet and pawl device, connected by a shaft to a vane, that is small enough to rectify the effect of random bombardment of gas molecules on the vane. The significance of the FSE is that it has inspired much activity in the area of Brownian ratchets. There is considerable interest in both the FSE and Brownian ratchets as these models are findin...

The erosion of the fixed guide vane a hydraulic turbine by sandy water is influenced not only flow velocity and mud concentration but also direction speed over surface. This study aims to investigate erosive effect sediment-laden on specific type turbine’s vane, validate efficacy discrete phase model (DPM) in simulating wear identify critical areas its To achieve these objectives, DPM are emplo...

Besides reciprocating compressors which are the traditional working machines in refrigeration cycles a growing number of different types of rotary compressors is used especially for air conditioning purposes. In an experimental investigation various reciprocating and rotary compressors were ana lysed concerning their thermodynamic and mechanical losses. The compressors investigated are all near...