The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform
Masahiro Kurosaki - One of the best experts on this subject based on the ideXlab platform.
-
Development of Double Gear Fuel Pump for Heat Management Improvement
Journal of Engineering for Gas Turbines and Power, 2010Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve specific fuel consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel recirculation at the high altitude low Mach number flight condition. Air cooled oil cooler (ACOC) is usually required for sufficient oil cooling at descent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due not only to the increased weight but also to the wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduc- tion by half of the double gear pump weight can be achieved by increasing pump speed twice without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability
-
Development of Double Gear Fuel Pump for Heat Managment Improvement
Volume 2: Aircraft Engine; Ceramics; Coal Biomass and Alternative Fuels; Controls Diagnostics and Instrumentation; Environmental and Regulatory Affair, 2006Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve Specific Fuel Consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel re-circulation at the high altitude low Mach number flight condition. Air Cooled Oil Cooler (ACOC) is usually required for sufficient oil cooling at decent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due to not only increased weight but also wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduction by half of the double gear pump weight can be achieved by increasing pump speed twice (2x) without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability.Copyright © 2006 by ASME
Yasushi Matsunaga - One of the best experts on this subject based on the ideXlab platform.
-
Development of Double Gear Fuel Pump for Heat Management Improvement
Journal of Engineering for Gas Turbines and Power, 2010Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve specific fuel consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel recirculation at the high altitude low Mach number flight condition. Air cooled oil cooler (ACOC) is usually required for sufficient oil cooling at descent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due not only to the increased weight but also to the wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduc- tion by half of the double gear pump weight can be achieved by increasing pump speed twice without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability
-
Development of Double Gear Fuel Pump for Heat Managment Improvement
Volume 2: Aircraft Engine; Ceramics; Coal Biomass and Alternative Fuels; Controls Diagnostics and Instrumentation; Environmental and Regulatory Affair, 2006Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve Specific Fuel Consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel re-circulation at the high altitude low Mach number flight condition. Air Cooled Oil Cooler (ACOC) is usually required for sufficient oil cooling at decent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due to not only increased weight but also wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduction by half of the double gear pump weight can be achieved by increasing pump speed twice (2x) without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability.Copyright © 2006 by ASME
Noriko Morioka - One of the best experts on this subject based on the ideXlab platform.
-
More Electric Engine Architecture for Aircraft Engine Application
Volume 3: Controls Diagnostics and Instrumentation; Education; Electric Power; Microturbines and Small Turbomachinery; Solar Brayton and Rankine Cycle, 2011Co-Authors: Noriko Morioka, Daiki Kakiuchi, Hitoshi Oyori, Kanji OzawaAbstract:This paper describes the system design and evaluation of a noble MEE (More Electric Engine) system. The results show that the proposed MEE system can significantly reduce the fuel burn of engines and CO2 emissions from aircraft and also improve the safety, reliability and maintainability of engines. The MEE is advanced engine control technology utilizing recent innovations in electrical motors, motor controllers and power electronics. It replaces conventional engine accessories, such as AGB (Accessory Gear Box)-driven pumps, hydraulic actuators with electrical pumps and EMAs (Electro-Mechanical Actuators), which are powered by generators. The first step of the MEE is supposed to be the motor-driven fuel pump system, which can improve engine efficiency by reducing power extraction from the engine and eliminating ACOCs (Air-Cooled Oil Coolers) which worsen fuel efficiency by wasting Fan Discharge air. The goal of the MEE consists of eliminating the heavy AGB via electrical accessories and an engine-embedded starter/generator. The incorporation of a unique redundant Active-Active control architecture and a fault-tolerant design for the dual motor system successfully achieves a highly reliable and complete one fail operational/two fail safe engine control system.© 2011 ASME
-
Development of Double Gear Fuel Pump for Heat Management Improvement
Journal of Engineering for Gas Turbines and Power, 2010Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve specific fuel consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel recirculation at the high altitude low Mach number flight condition. Air cooled oil cooler (ACOC) is usually required for sufficient oil cooling at descent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due not only to the increased weight but also to the wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduc- tion by half of the double gear pump weight can be achieved by increasing pump speed twice without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability
-
Development of Double Gear Fuel Pump for Heat Managment Improvement
Volume 2: Aircraft Engine; Ceramics; Coal Biomass and Alternative Fuels; Controls Diagnostics and Instrumentation; Environmental and Regulatory Affair, 2006Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve Specific Fuel Consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel re-circulation at the high altitude low Mach number flight condition. Air Cooled Oil Cooler (ACOC) is usually required for sufficient oil cooling at decent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due to not only increased weight but also wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduction by half of the double gear pump weight can be achieved by increasing pump speed twice (2x) without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability.Copyright © 2006 by ASME
Seiei Masuda - One of the best experts on this subject based on the ideXlab platform.
-
Development of Double Gear Fuel Pump for Heat Management Improvement
Journal of Engineering for Gas Turbines and Power, 2010Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve specific fuel consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel recirculation at the high altitude low Mach number flight condition. Air cooled oil cooler (ACOC) is usually required for sufficient oil cooling at descent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due not only to the increased weight but also to the wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduc- tion by half of the double gear pump weight can be achieved by increasing pump speed twice without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability
-
Development of Double Gear Fuel Pump for Heat Managment Improvement
Volume 2: Aircraft Engine; Ceramics; Coal Biomass and Alternative Fuels; Controls Diagnostics and Instrumentation; Environmental and Regulatory Affair, 2006Co-Authors: Yasushi Matsunaga, Seiei Masuda, Noriko Morioka, Masahiro KurosakiAbstract:A unique double gear fuel pump system with operation mode switching capability for aircraft engines was developed to solve the heat management problem of current high efficiency turboFan engines and improve Specific Fuel Consumption (SFC). Mode switching from parallel operations to series operations was found to reduce the Discharge flow and pump work to nearly half. This resulted in the reduction of the rise in fuel temperature due to the fuel re-circulation at the high altitude low Mach number flight condition. Air Cooled Oil Cooler (ACOC) is usually required for sufficient oil cooling at decent or approach flight conditions. Since fuel consumption at those conditions is not very high, most of the gear pump Discharge fuel flow proportional to the engine speed is returned to the fuel pump inlet resulting in significant heating. The ACOC that provides additional cooling capability degrades SFC due to not only increased weight but also wasted Fan Discharge air. By reducing fuel temperature rise at the pump at those flight conditions, the necessity of ACOC may be eliminated. Further, it is shown that a reduction by half of the double gear pump weight can be achieved by increasing pump speed twice (2x) without incurring a durability penalty. Extensive tests showed sufficient steady state pump performance, switching characteristics, and durability.Copyright © 2006 by ASME
Brian G. Thomas - One of the best experts on this subject based on the ideXlab platform.
-
Measurement of heat flux in dense air-mist cooling: Part II - The influence of mist characteristics on steady-state heat transfer
Experimental Thermal and Fluid Science, 2013Co-Authors: Constantin A. Hernández-bocanegra, Jesús I. Minchaca-mojica, Francisco A. Acosta-gonzález, Xiaoxu Zhou, Brian G. ThomasAbstract:The boiling convection heat flux, � q, taking place during the impingement of a water air-mist upon the surface of a Pt-disk, held at steady-state surface temperatures Tw ranging between 550 and 1200 C, has been measured under different conditions of water impact density, w, droplet velocity, u, and droplet size, dd. The new steady-state measurement method controls induction heating to balance the heat extracted from the sample, as described in detail in Part I. Local mist characteristics were determined at room temperature in free non-impinging mists using a patternator for w and a particle/droplet image analyzer (PDIA) for dd and u at positions equivalent to those of the Pt-disk. Three different air-mist nozzles of Fan Discharge type are characterized over their full range of water flow rates and air inlet pressures and using different positions of the hot surface with respect to the nozzle, to cover the following ranges of local spray characteristics: w from 2 to 106 L/m 2 s; normal volume weighted mean velocities, uz,v, from 9.3 to 45.8 m/s and volume mean diameters, d30, from 19 to 119 lm. Increasing the air nozzle pressure at constant water flow rate generates mists with finer and faster drops that lead to a higher frequency of drops with large impinging Weber numbers, suggesting a higher probability of wet contact with the surface and an enhanced heat extraction. Heat fluxes as large as � 12 and � 10 MW/m 2 were found in the transition and stable film boiling regimes, respectively. The boiling convection heat flux in the range of 750–1200 C, which corresponded to stable film boiling, was found to correlate very well with the mist , !
