... operating temperatures. Therefore, accurate thermal mapping is now more critical than ever for validating new designs, but also very challenging in such a dynamic environment as a gas turbine. A novel advanced offline temperature mapping technology has been developed called thermal history coating (THC...

... and molar fractions of water were obtained using thermal and electrostrictive LIGS signals. Temperatures up to 1800 K and water molar fractions between 0.01 and 0.12 were measured. A new analytic approach was developed to extract temperature from the frequencies of the measured signal within the flame brush...

... simulation across all operating regimes so monitoring relies on sparse physical measurements. Alone, these sparse data lack the fidelity for real-time prediction of a complex thermal field. A novel hybrid methodology is proposed, coupling data across a range of fidelities to bridge the limitations...

... 3, 2018; published online September 14, 2018. Editor: Jerzy T. Sawicki. 22 06 2018 03 07 2018 Heat transfer Temperature Thermal Turbines Unsteady The increasing share of renewable energy sources (RES) in electricity generation—especially in western European countries...

... uncertainty analysis of the two-step routine is included based on the value of the pulse of heat flux, the temperature measurement uncertainty, the thermal properties of the material, and the physical properties of the rotor casing. We can predict the baseline pressure with the data from the other data...

... conversion Gas turbine technology Heat recovery Modeling Power systems Temperature Thermal Thermodynamics Turbines Two-phase Vibration Over the past years, the consumption of fossil fuel continues to grow [ 1 ] due to the increase in energy demand in both heat and electricity forms...

... power Next, the VFD's overall efficiency and thermal performance was experimentally measured at 25, 50, 70, and 105 °C coolant inlet temperatures. The results are shown in Fig. 17 and show relatively little variation with regard to coolant temperature. In all cases, the maximum efficiency...

.... The degradations are flow capacity degradation and isentropic efficiency degradation. An engine model was created in Cranfield gas turbine performance and diagnostics software, pythia . Blade thermal and stress models were developed together with the Larson–Miller parameter (LMP) method for creep life analysis...

... efficiencies for both wet and combined cycles. We also show that when optimally used, nonreactive matter transfers, like water, provide an alternative, but not superior, thermal regeneration strategy to direct heat regeneration. References [1] Ramakrishnan , S. , and Edwards , C. F. , 2014...

.... Technol. , 26 , p. 025303. 10.1088/0957-0233/26/2/025303 [10] Anthony , R. J. , Oldfield , M. L. G. , Jones , T. V. , and LaGraff , J. E. , 1999 , “ Development of High-Density Arrays of Thin Film Heat Transfer Gauges ,” ASME/JSME Thermal Engineering Joint Conference, San Diego, CA...

... transfer functions to predict the disk's thermal response over a typical flight. The model uses only typically available full authority digital electronic control (FADEC) measurements to predict temperature with accuracy of ±30 K over the whole flight cycle. A Kalman filter has also been developed based...

... of methodological improvement are analyzed and proposed in the frame of an integrated approach for steam turbine components thermostructural analysis, reliability, and lifetime prediction. The full scope of the engineering tasks includes aero/thermodynamic flow path and secondary flows analysis to determine thermal...

... for fast starts. In current practice, turbine start-up limitations are set by consideration of thermal stress and low cycle fatigue. However, the pursuit of faster starts raises the question whether other thermal phenomena can become a limiting factor to the start-up process. Differential expansion (DE...

...Larry Lebel; Sylvain Turenne; Rachid Boukhili This paper presents an experimental procedure developed to simulate the behavior of ceramic matrix composites (CMCs) under the cyclic thermal stresses of a gas turbine combustion chamber. An experimental apparatus was assembled that produces...

... closures, through the frictional heat generated at the leaf–rotor interface when in contact, represents an important challenge for leaf seal analysis and design. This coupling can lead to leaf wear and loss, rotor overheating, and possibly to unstable sealing system behavior (thermal runaway...

...Julien Pohl; Harvey M. Thompson; Ralf C. Schlaps; Shahrokh Shahpar; Vincenzo Fico; Gary A. Clayton At present, it is a common practice to expose engine components to main annulus air temperatures exceeding the thermal material limit in order to increase the overall engine performance...

...Xijia Wu; Zhong Zhang; Leiyong Jiang; Prakash Patnaik Nozzle guide vanes (NGV) of gas turbine engines are the first components to withstand the impingement of hot combustion gas and therefore often suffer thermal fatigue failures in service. A lifting analysis is performed for the NGV of a gas...

...Travis A. Cable; Luis San Andrés; Karl Wygant Multiple-stage integrally geared compressors (IGCs) offer improved thermal efficiency and easier access for maintenance and overhaul than single-shaft centrifugal compressors. In an IGC, a main bull shaft drives pinion shafts, each having an impeller...

..., precise boundary conditions in terms of local temperatures as well as heat transfer coefficients are essential. In order to gain such information and understand the flow physics behind them, more and more complex thermal modeling approaches are necessary, like computational fluid dynamics (CFD) or even...

...Steffen Kahlert; Hartmut Spliethoff Intermittency of renewable electricity generation poses a challenge to thermal power plants. While power plants in the public sector see a decrease in operating hours, the utilization of industrial power plants is mostly unaffected because process steam has...