... computational heat transfer internal flow jets swirling turbines In order to further increase the efficiency and power, gas temperature at gas turbine inlet becomes extremely high which is far beyond the thermal limit of the material. Thus, cooling technique is critical to protect the blade...

...Koichi Yonezawa; Tomoki Kagayama; Masahiro Takayasu; Genki Nakai; Kazuyasu Sugiyama; Katsuhiko Sugita; Shuichi Umezawa Deteriorations of nozzle guide vanes (NGVs) and rotor blades of a steam turbine through a long-time operation usually decrease a thermal efficiency and a power output...

...Piotr Łuczyński; Dennis Toebben; Manfred Wirsum; Wolfgang F. D. Mohr; Klaus Helbig In pursuit of flexibility improvements, General Electric has developed a product to warm-keep high/intermediate pressure steam turbines using hot air. In order to optimize the warm-keeping operation and to gain...

... transfer Engines Measurement techniques Thermal Turbines Manuscript received June 23, 2018; final manuscript received June 27, 2018; published online September 14, 2018. Editor: Jerzy T. Sawicki. – Thickness of the material ( x ): higher thicknesses lead to higher damping...

... reduces the lifetime. To improve the ability for fast start-ups, information about the metal temperature inside the rotor and the casing are crucial. Thus, an efficient calculation approach is required which enables the prediction of the temperature distribution in a whole multistage steam turbine...

...J. Saavedra; G. Paniagua The aerothermal performance of the low-pressure turbine in unmanned aerial vehicles is significantly abated at high altitude, due to boundary layer separation. Different flow control strategies have been proposed to prevent boundary layer separation, such as dielectric...

...G. Paniagua; D. Cuadrado; J. Saavedra; V. Andreoli; T. Meyer; J. P. Solano; R. Herrero; S. Meyer; D. Lawrence Following three decades of research in short duration facilities, Purdue University has developed an alternative turbine facility in view of the modern technology in computational fluid...

.... The application of the method is demonstrated by means of the flow through a well-known steam turbine cascade test case. Predicted variations of loss coefficients for different operating conditions can be confirmed by experimental observations. For the investigated test cases, the thermodynamic relaxation...

...Alessandro Bo; Eugenio Giacomazzi; Giuseppe Messina; Antonio Di Nardo The work in this paper investigates on how a fuel flexible microgas turbine (MGT) combustion chamber, developed by ANSALDO ENERGIA and installed in a Turbec T100 P MGT, can operate when transferring from natural gas (NG...

... in the Limaçon Gas Expanders ,” ASME J. Eng. Gas Turbines Power , 133 (( 10 ), p. 103002 . 10.1115/1.4003195 [6] Sultan , I. , 2012 , “ Optimum Design of Limaçon Gas Expanders Based on Thermodynamic Performance ,” Appl. Therm. Eng. , 39 , pp. 188 – 197 . 10.1016/j.applthermaleng.2012.01.039...

...Joseph Saverin; Giacomo Persico; David Marten; David Holst; George Pechlivanoglou; Christian Oliver Paschereit; Vincenzo Dossena The evolution of the wake of a wind turbine contributes significantly to its operation and performance, as well as to those of machines installed in the vicinity...

... systems Engines Experimental Finite element Internal combustion engines Modeling Power Thermal Turbines Control systems Co- generation Hybridized and fully electrified boosting technologies have become increasingly popular in recent years. Engine-boosting provides advantages in terms...

... . Manuscript received June 16, 2017; final manuscript received February 19, 2018; published online July 31, 2018. Assoc. Editor: Riccardo Da Soghe. 16 06 2017 19 02 2018 Aerodynamics Computational fluid dynamics Design optimization Experimental Turbines Fig. 27 Comparison...

...Kenneth Clark; Michael Barringer; David Johnson; Karen Thole; Eric Grover; Christopher Robak Secondary air is bled from the compressor in a gas turbine engine to cool turbine components and seal the cavities between stages. Unsealed cavities can lead to hot gas ingestion, which can degrade critical...

...Chirag Trivedi This work investigates the unsteady pressure fluctuations and inception of vortical flow in a hydraulic turbine during speed-no-load conditions. At speed-no-load (SNL), the available hydraulic energy dissipates to the blades without producing an effective torque. This results in high...

...Wen Li; Xing Wang; Xuehui Zhang; Xinjing Zhang; Yangli Zhu; Haisheng Chen It is a common practice to use closed impeller in radial inflow turbine against the flow leakage from tip clearance of impellers, especially in small volume flow condition. It utilizes labyrinths between the shroud...

... turbochargers (TC) are especially susceptible to this dynamic and are often equipped with variable geometry turbines (VGT) to mitigate some of this effect. Assisted boosting techniques that add power directly to the TC shaft from a power source that is independent of the engine have been shown to significantly...

...Martin T. White; Christos N. Markides; Abdulnaser I. Sayma In this paper, the effect of working-fluid replacement within an organic Rankine cycle (ORC) turbine is investigated by evaluating the performance of two supersonic stators operating with different working fluids. After designing the two...

...Dun Lin; Xinrong Su; Xin Yuan The wake vortex is an important origin of unsteadiness and losses in turbines. In this paper, the development and underlying mechanisms of the shedding vortex of a high-pressure transonic turbine vane are studied and analyzed using the delayed detached eddy simulation...

... received November 12, 2017; final manuscript received December 5, 2017; published online April 26, 2018. Editor: David Wisler. 12 11 2017 05 12 2017 Computational fluid dynamics Equilibrium Film Finite element methods Gas turbine technology Modeling Shear Flows Turbines...