... for publication in the J OURNAL OF H EAT T RANSFER . Manuscript received June 14, 2016; final manuscript received April 20, 2017; published online May 16, 2017. Editor: Portonovo S. Ayyaswamy. 14 06 2016 20 04 2017 Energy systems Aerospace applications Engines Fluids Gas turbine...

...Minking K. Chyu The performance goal of modern gas turbine engines, both land-base and air-breathing engines, can be achieved by increasing the turbine inlet temperature (TIT). The level of TIT in the near future can reach as high as 1700 °C for utility turbines and over 1900 °C for advanced...

...Nawaf Y. Alkhamis; Akhilesh P. Rallabandi; Je-Chin Han Heat transfer coefficients and friction factors are measured in a 45 deg V-shaped rib roughened square duct at high Reynolds numbers, pertaining to internal passages of land-based gas turbine engines. Reynolds numbers in this study range from...

...Parviz Merati; Charles Davis; K.-H. Chen; J. P. Johnson Particle image velocimetry and thermal measurements using thermocouples are used to measure the buoyant flow of a simplified full-scale model of an engine compartment. The engine block surface temperature and exhaust heaters are kept at about...

... to its currents.” In this paper, we show how the constructal law accounts for the main features of the design of the biosphere: global movement of mass as the action of constructal engines (geophysical, animal, and human made) that dissipate their power into brakes, animal locomotion, vision, cognition...

... and complexity of the flow features present in those systems still require experimental validation of real engine designs. Among the experimental techniques possible to be used, transient liquid crystal method offers good resolution as well as sufficient accuracy. Under this investigation, an impingement cooling...

... by Bunker ( 31 ) Performance comparison of various tips under Case 2 25 02 2009 29 05 2009 30 12 2009 30 12 2009 channel flow convection cooling engines gas turbines tip wall pin fins enhancement computation gas turbine cooling...

... (°C) T aw adiabatic wall temperature (°C) x axial distance along serpentine passage (m) x + nondimensional axial distance along passage ( 2 x ∕ D Re Pr ) This work was funded in large part by GE Aircraft Engines through the University...

... to be undertaken that match the actual engine conditions. Laboratory-scale heat transfer measurements along centerlines of two rib-roughened surfaces are performed with Reynolds number (Re), rotation number (Ro), and density ratio ( Δ ρ ∕ ρ ) in the ranges of 7500–15,000, 0–1.8, and 0.076–0.294. The experimental...

...Ronald S. Bunker Film cooling represents one of the few game-changing technologies that has allowed the achievement of today’s high firing temperature, high-efficiency gas turbine engines. Over the last 30 years, only one major advancement has been realized in this technology, that being...

...P. C. T. de Boer, Mem. ASME, Graduate School Professor of Mechanical and Aerospace Engineering, The flow through the regenerator of a Stirling engine is driven by differences of pressure in the compression and expansion spaces. These differences lead to power dissipation in the regenerator. Using...

... on temperature profiles inside droplets, is compared with predictions of the parabolic temperature profile and isothermal models. The comparison shows the applicability of the parabolic approximation to modelling of the heating of fuel droplets in realistic diesel engines. The simplicity of the model makes...

...Chan-Woo Park; Massoud Kaviany An existing in-cylinder thermal regeneration concept for Diesel engines is examined for the roles of the porous insert motion and the fuel injection strategies on the fuel evaporation and combustion and on the engine efficiency. While the heated air emanating from...

... for publication in the JOURNAL OF HEAT TRANSFER . Manuscript received by the Heat Transfer Division, Jan. 21, 1999; revision received, Dec. 2, 1999. Associate Technical Editor: J.-C. Han. 21 Jan 1999 02 Dec 1999 cooling confined flow heat transfer Engines Film Cooling Flow Heat...