J. Eng. Gas Turbines Power: All Topics http://scitation.aip.org/ J. Eng. Gas Turbines Power: All Topics Two Algorithms for the Reliable Estimation of Organic Rankine Cycle Performance http://link.aip.org/link/doi/10.1115/1.4004839 Guillaume Becquin and Matthew Lehar<br/> As the demand grows for low-temperature waste heat recovery systems, organic Rankine cycles (ORCs), and other alternatives to traditional steam, Rankine cycles are becoming more common in industry. Although analytical tools exist that can predict the performance of a steam cycle in a given waste-hea ... [J. Eng. Gas Turbines Power 134, 044504 (2012)] published Mon Feb 6, 2012. Performance of a Direct Injection Diesel Engine Fueled by a Heavy Oil With the Addition of Low Density Polyethylene (LDPE) Polymer http://link.aip.org/link/doi/10.1115/1.4004481 V. Soloiu and A. Covington<br/> Considering the escalating cost of fossil fuels in correlation with the growing influence of sustainability, the need to seek new alternative fuels is increasing rapidly. This movement has lead researchers to look beyond the usual alternative fuels and focus on plastics as an energy resource in the ... [J. Eng. Gas Turbines Power 134, 044503 (2012)] published Fri Jan 27, 2012. Numerical Investigation of a Centrifugal Compressor With Holed Casing Treatment http://link.aip.org/link/doi/10.1115/1.4004444 Wei Xu, Tong Wang, Chuangang Gu, and Liang Ding<br/> The holed casing treatment is a new type of casing treatment that has self-adaptability for a centrifugal compressor with unshrouded impeller. It was demonstrated experimentally and numerically that both the stall margin and the choked margin of the compressor were able to be expanded by the treatme ... [J. Eng. Gas Turbines Power 134, 044502 (2012)] published Wed Jan 25, 2012. Telemetry System Integrated in a Small Gas Turbine Engine http://link.aip.org/link/doi/10.1115/1.4004260 Stephen A Long, Stephen L Edney, Patrick A Reiger, Michael W Elliott, Frank Knabe, and Dieter Bernhard<br/> For the purpose of assessing combustion effects in a small gas turbine engine, there was a requirement to evaluate the rotating temperature and dynamic characteristics of the power turbine rotor module. This assessment required measurements be taken within the engine, during operation up to maximum ... [J. Eng. Gas Turbines Power 134, 044501 (2012)] published Wed Jan 18, 2012. Air System and Diesel Combustion Modeling for Hardware in the Loop Applications http://link.aip.org/link/doi/10.1115/1.4004597 Jean-Baptiste Millet, Fadila Maroteaux, and Fabrice Aubertin<br/> The development of engine control unit (ECU) systems for series production requires an important validation phase. In order to reduce the number of time consuming and expensive vehicle tests, the ECU is validated using hardware in the loop (HIL) test bench. The HIL simulates the engine behavior in r ... [J. Eng. Gas Turbines Power 134, 042802 (2012)] published Fri Jan 27, 2012. Ion Current, Combustion and Emission Characteristics in an Automotive Common Rail Diesel Engine http://link.aip.org/link/doi/10.1115/1.4004074 Naeim A. Henein, Tamer Badawy, Nilesh Rai, and Walter Bryzik<br/> Advanced electronically controlled diesel engines require a feedback signal to the ECU to adjust different operating parameters and meet demands for power, better fuel economy and low emissions. Different types of in-cylinder combustion sensors are being considered to produce this signal. This paper ... [J. Eng. Gas Turbines Power 134, 042801 (2012)] published Wed Jan 25, 2012. Effects of Wind Turbine Starting Capability on Energy Yield http://link.aip.org/link/doi/10.1115/1.4004741 Supakit Worasinchai, Grant L. Ingram, and Robert G. Dominy<br/> The purpose of this study was to investigate the effect of turbine starting capability on overall energy-production capacity. The investigation was performed through the development and validation of matlab/Simulink models of turbines. A novel aspect of this paper is that the effects of load types, ... [J. Eng. Gas Turbines Power 134, 042603 (2012)] published Wed Feb 1, 2012. Stall Inception, Evolution and Control in a Low Speed Axial Fan With Variable Pitch in Motion http://link.aip.org/link/doi/10.1115/1.4004726 Stefano Bianchi, Alessandro Corsini, Luca Mazzucco, Lucilla Monteleone, and Anthony G. Sheard<br/> Obtaining the right pitch in turbomachinery blading is crucial to efficient and successful operations. Engineers adjust the rotor's pitch angle to control the production or absorption of power. Even for low speed fans this is a promising tool. This paper focuses on the inception and the evolution of ... [J. Eng. Gas Turbines Power 134, 042602 (2012)] published Mon Jan 30, 2012. Predicting Blade Leading Edge Erosion in an Axial Induced Draft Fan http://link.aip.org/link/doi/10.1115/1.4004724 Alessandro Corsini, Andrea Marchegiani, Franco Rispoli, Paolo Venturini, and Anthony G. Sheard<br/> Induced draft fans extract coal fired boiler combustion products, including particles of un-burnt coal and ash. As a consequence of the particles, the axial fan blades' leading edges are subject to erosion. Erosion results in the loss of the blade leading edge aerodynamic profile and a reduction of ... [J. Eng. Gas Turbines Power 134, 042601 (2012)] published Mon Jan 30, 2012. Eddy Current Damper for Turbine Blading: Electromagnetic Finite Element Analysis and Measurement Results http://link.aip.org/link/doi/10.1115/1.4004734 Jacob Laborenz, Malte Krack, Lars Panning, Jorg Wallaschek, Markus Denk, and Pierre-Alain Masserey<br/> In the dynamics of turbomachinery, the mechanical damping of the blading has been the focus of research for the last decades to improve the dynamic performance in terms of high cycle fatigue issues. In addition, an increased mechanical damping can produce a higher flutter safety margin such that sta ... [J. Eng. Gas Turbines Power 134, 042504 (2012)] published Wed Feb 1, 2012. Rotordynamic Force Coefficients for Three Types of Annular Gas Seals With Inlet Preswirl and High Differential Pressure Ratio http://link.aip.org/link/doi/10.1115/1.4004537 B. H. Ertas, A. Delgado, and G. Vannini<br/> The following paper presents and compares rotordynamic force coefficients for three types of non-contact annular gas seals, which include a labyrinth (LABY), honeycomb (HC), and a fully partitioned damper seal (FPDS). These three annular seals represent the typical seal types used in process gas cen ... [J. Eng. Gas Turbines Power 134, 042503 (2012)] published Fri Jan 27, 2012. The Deduction of the Integral and the Estimation of the Local Core Rotation Ratio by Telemetric Pressure Measurements in a Two Cavity Test Rig http://link.aip.org/link/doi/10.1115/1.4004452 Wieland Uffrecht and Andre Gunther<br/> The heat transfer in rotating cavities, as found in the internal air system of gas turbines, is mainly governed by the flow passing through these specific machine structures. The core rotation ratio represents the circumferential velocity, and is thought to be an influential flow parameter for heat ... [J. Eng. Gas Turbines Power 134, 042502 (2012)] published Wed Jan 25, 2012. Wind Turbine Gearbox Fault Detection Using Multiple Sensors With Features Level Data Fusion http://link.aip.org/link/doi/10.1115/1.4004438 Y. Lu, J. Tang, and H. Luo<br/> Fault detection in complex mechanical systems such as wind turbine gearboxes remains challenging, even with the recently significant advancement of sensing and signal processing technologies. As first-principle models of gearboxes capable of reflecting response details for health monitoring purpose ... [J. Eng. Gas Turbines Power 134, 042501 (2012)] published Wed Jan 25, 2012. Selection of Climatic Design Points for Gas Turbine Power Augmentation http://link.aip.org/link/doi/10.1115/1.4004436 Mustapha Chaker and Cyrus B. Meher-Homji<br/> There is a widespread interest in the application of gas turbine power augmentation technologies such as evaporative cooling and mechanical chilling in the mechanical drive and power generation markets. Very often, the selection of the design point is based on the use of American Society of Heating ... [J. Eng. Gas Turbines Power 134, 042001 (2012)] published Wed Jan 25, 2012. Application of an Optimal Tuner Selection Approach for On-Board Self-Tuning Engine Models http://link.aip.org/link/doi/10.1115/1.4004178 Donald L. Simon, Jeffrey B. Armstrong, and Sanjay Garg<br/> An enhanced design methodology for minimizing the error in on-line Kalman filter-based aircraft engine performance estimation applications is presented in this paper. It specifically addresses the under-determined estimation problem, in which there are more unknown parameters than available sensor m ... [J. Eng. Gas Turbines Power 134, 041601 (2012)] published Fri Jan 27, 2012. An Experimental Study of Lean Blowout With Hydrogen-Enriched Fuels http://link.aip.org/link/doi/10.1115/1.4004742 Shengrong Zhu and Sumanta Acharya<br/> Lean premixed combustion is widely used to achieve a better compromise between nitric oxide (NO) emissions and combustion efficiency (related to CO levels). However, combustor operation near the lean blowout (LBO) limit can render the flame unstable and lead to oscillations, flashback, or extinction ... [J. Eng. Gas Turbines Power 134, 041507 (2012)] published Wed Feb 1, 2012. Experimental Analysis of Confined Jet Flames by Laser Measurement Techniques http://link.aip.org/link/doi/10.1115/1.4004733 Oliver Lammel, Michael Stohr, Peter Kutne, Claudiu Dem, Wolfgang Meier, and Manfred Aigner<br/> An experimental analysis of confined premixed turbulent methane/air and hydrogen/air jet flames is presented. A generic lab scale burner for high-velocity preheated jets equipped with an optical combustion chamber was designed and set up. The size and operating conditions were configured to enable f ... [J. Eng. Gas Turbines Power 134, 041506 (2012)] published Wed Feb 1, 2012. Experimental Investigation on the Effects of a Large Recirculating Area on the Performance of an Effusion Cooled Combustor Liner http://link.aip.org/link/doi/10.1115/1.4004729 Lorenzo Tarchi, Bruno Facchini, Francesco Maiuolo, and Daniele Coutandin<br/> An experimental analysis of a realistic engine cooling scheme was performed on a test article replicating a slot injection and an effusion array with a central large dilution hole. A test section consists of a rectangular cross-section duct with a flat plate comprised of 270 effusion holes arranged ... [J. Eng. Gas Turbines Power 134, 041505 (2012)] published Mon Jan 30, 2012. Numerical Simulations of Turbulent Mixing and Autoignition of Hydrogen Fuel at Reheat Combustor Operating Conditions http://link.aip.org/link/doi/10.1115/1.4004725 Elizaveta M. Ivanova, Berthold E. Noll, Peter Griebel, Manfred Aigner, and Khawar Syed<br/> Turbulent mixing and autoignition of H-rich fuels at relevant reheat combustor operating conditions are investigated in the present numerical study. The flow configuration under consideration is a fuel jet perpendicularly injected into a crossflow of hot flue gas (T>1000K,p=15 bar). Based on the res ... [J. Eng. Gas Turbines Power 134, 041504 (2012)] published Mon Jan 30, 2012. A Comparative Study of Flamelet and Finite Rate Chemistry LES for a Swirl Stabilized Flame http://link.aip.org/link/doi/10.1115/1.4004718 C. Fureby<br/> Present-day demands on combustion equipment are increasing the need for improved understanding and prediction of turbulent combustion. Large eddy simulation (LES), in which the large-scale flow is resolved on the grid, leaving only the small-scale flow to be modeled, provides a natural framework for ... [J. Eng. Gas Turbines Power 134, 041503 (2012)] published Fri Jan 27, 2012. Autoignition Limits of Hydrogen at Relevant Reheat Combustor Operating Conditions http://link.aip.org/link/doi/10.1115/1.4004500 J. Fleck, P. Griebel, A.M. Steinberg, M. Stohr, M. Aigner, and A. Ciani<br/> The use of highly reactive fuels in the lean premixed combustion systems employed in stationary gas turbines can lead to many practical problems, such as unwanted autoignition in regions not designed for combustion. In the present study, autoignition characteristics for hydrogen, diluted with up to ... [J. Eng. Gas Turbines Power 134, 041502 (2012)] published Wed Jan 25, 2012. Experimental and Modeling Studies of the Oxidation of Surrogate Bio-Aviation Fuels http://link.aip.org/link/doi/10.1115/1.4004235 Ida Shafagh, Kevin J. Hughes, Elena Catalanotti, Zhen Liu, Mohamed Pourkashanian, and Chris W. Wilson<br/> Jet fuels currently in use in the aviation industry are exclusively kerosene-based. However, potential problems regarding security of supply, climate change, and increasing cost are becoming more significant, exacerbated by the rapidly growing demand from the aviation sector. Biofuels are considered ... [J. Eng. Gas Turbines Power 134, 041501 (2012)] published Wed Jan 25, 2012.