| Multi-Nozzle Spray Cooling in a Closed Loop (POSTPRINT) |
MAR 2011 |
8 pages |
| Authors:
Quinn Leland; Lanchao Lin; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIR/POWER DIV/MECHANICAL ENERGY CONVERSION BRANCH
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 | A closed two-phase loop system was developed that combined with a multi-nozzle spray cooling unit for the cooling of high heat flux power sources. The fluid circulation was sustained by a magnetic gear pump operating with an ejector pump unit. The motive flow of the ejector shared the pumping liquid flow with the multi-nozzle spray. The use of the ejector stabilized the circulation of the two-phase flow. A multi-nozzle plate ... |
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| Software Package on Integrated Nonlinear Dynamic Modeling and Field Oriented Control (FOC) of Permanent Magnet (PM) Motor for High Performance Electromechanical Actuators (EMAs) |
Jan 2011 |
51 pages |
| Authors:
Quinn Leland; Thomas X Wu; Louis Chow; David Woodburn; Lei Zhou; Jared Bindl; Yang Hu; Wendell Brokaw; UNIVERSITY OF CENTRAL FLORIDA ORLANDO
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| The development of all-electric aircraft is a high priority in the avionics community. Current aircraft use a combination of hydraulic, pneumatic, and electric systems for flight control. However, the expectation for future airplanes is a single, electric system using electromechanical actuators (EMAs). Such a system would reduce the cost to build, operate, and maintain aircraft. It would also make aircraft lighter, more reliable, safer, and more easily reconfigurable, reducing the ... |
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| Dynamic Testing of Electromechanical Actuators Using Time-History Data |
Nov 2010 |
11 pages |
| Authors:
Nicholas Rolinski; Quinn Leland; Earl Gregory; Brett Jordan; David Woodburn; Thomas Wu; DAYTON UNIV RESEARCH INST (URDI) OH
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| A commercial electromechanical actuator (EMA) is to be dynamically tested with predetermined stroke and load profiles for transient thermal and electric power behavior to validate a numerical model used for aerospace applications. The EMA will follow the stroke profile representative of a real aircraft mission duty cycle. A hydraulic press will exert a corresponding load profile onto the EMA. Specialized hydraulic load control methods must be employed to meet the ... |
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| Integrated Nonlinear Dynamic Modeling and Field Oriented Control of Permanent Magnet (PM) Motor for High Performance EMA |
Nov 2010 |
18 pages |
| Authors:
David Woodburn; Thomas Wu; Shaohua Lin; Jared Bindl; Yang Hu; Wendell Brokaw; Louis Chow; Lei Zhon; Yeong-Ren Lin; Quinn Leland; Nicholas Rolinski; UNIVERSITY OF CENTRAL FLORIDA ORLANDO
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| This paper describes the integrated modeling of a permanent magnet (PM) motor used in an electromechanical actuator (EMA). A nonlinear, lumped-element motor electric model is detailed. The parameters, including nonlinear inductance, rotor flux linkage, and thermal resistances, and capacitances, are tuned using FEM models of a real, commercial motor. The field-oriented control (FOC) scheme and the lumped-element thermal model are also described. |
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| Lumped Node Thermal Modeling of EMA with FEA Validation (PREPRINT) |
NOV 2010 |
20 pages |
| Authors:
Lei Zhou; Yeong-Ren Lin; Louis Chow; David Woodburn; Thomas Wu; Jared Bindl; Yang Hu; Wendell Brokaw; Quinn Leland; Ben Tran; Brett Jordan; Earl Gregory; Steve Iden; Nicholas Rolinski; UNIVERSITY OF CENTRAL FLORIDA ORLANDO DEPT OF MECHANICAL MATERIALS AND AEROSPACE ENGINEERING
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| The development of electromechanical actuators (EMAs) is the key technology to build an all-electric aircraft. One of the greatest hurdles to replacing all hydraulic actuators on an aircraft with EMAs is the acquisition, transport and rejection of waste heat generated within the EMAs. The absence of hydraulic fluids removes an attractive and effective means of acquiring and transporting the heat. To address thermal management under limited cooling options, accurate spatial ... |
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| Investigation of Super Tube Structure and Performance (Postprint) |
APR 2010 |
11 pages |
| Authors:
Quinn Leland; Rengasamy Ponnappan; Lanchao Lin; Edward Mahefkey; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIR/POWER DIV
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| A new kind of heat transport device introduced by an inventor is intriguing the heat pipe community for the past several years. This device with the resemblance of the hermetically sealed structure and design of a conventional heat pipe or thermosyphon is claimed as thermally superconductive and offers solid state mode of heat transport. A host of speculations about this claim was emerging among research agencies that included academic and ... |
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| Metal Hydride Heat Storage Technology for Directed Energy Weapon Systems |
16-Nov-2007 |
10 pages |
| Authors:
Chanwoo Park; Xudong Tang; Kwang J Kim; Joseph Gottschlich; Quinn Leland; ADVANCED COOLING TECHNOLOGIES INC LANCASTER PA
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| Directed Energy Weapon (DEW) systems in a pulse operation mode dissipate excessively large, transient waste heat because of their inherent inefficiencies. The heat storage system can store such a pulsed heat load not relying on oversized systems and dissipate the stored heat over time after the pulse operation. A compressor-driven metal hydride heat storage system was developed for efficient, compact heat storage and dissipation of the transient heat from the ... |
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| High Performance Heat Storage and Dissipation Technology |
11 Nov 2005 |
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| Authors:
Chanwoo Park; Kwang J Kim; Joseph Gottschlich; Quinn Leland; ADVANCED COOLING TECHNOLOGIES INC LANCASTER PA
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 | High power solid state laser systems operating in a pulse mode dissipate the transient and excessively large waste heat from the laser diode arrays and gain material. The heat storage option using Phase Change Materials (PCMs) has been considered to manage such peak heat loads not relying on oversized systems for real-time cooling. However, the PCM heat storage systems suffer from the low heat storage densities and poor thermal conductivities ... |
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