公开(公告)号：US10686358B2

公开(公告)日：2020-06-16

申请号：US15756816

申请日：2016-09-01

申请人： Safran Helicopter Engines

发明人： Camel Serghine ,  Thomas Klonowski ,  Stéphane Beddok ,  Stéphane Richard

IPC分类号： H02K44/10 ,  H02K44/12 ,  F01D15/10 ,  H02K44/08 ,  H02K44/28 ,  B64C27/04

摘要： The invention relates to the field of magnetohydrodynamic generators, and more precisely to such a generator (10) comprising a working fluid flow passage (11) that is defined by a first wall (12) and a second wall (13), an ionizing device (14) for ionizing the working fluid, a pair of arms (15), each connecting together the first and second walls (12, 13) downstream from said ionizing device (14) so as to define, within the flow passage (11), a channel (16) between said arms (15) and said walls (12, 13), said channel (16) being arranged to be traversed by a portion of the working fluid after it has been ionized, a magnet for generating a magnetic field (B) oriented in a direction that is perpendicular to the flow of the working fluid through the channel (16) defined by the pair of arms (15) and said walls (12, 13), and at least one pair of electrodes (17), each of the electrodes (17) in each pair being arranged on a respective side of the channel (16) defined by the pair of arms (15) and said walls (12, 13), said electrodes (17) in each pair being spaced apart from each in a direction that is perpendicular to said magnetic field (B) and to the flow direction of the working fluid through the channel (16) defined by the pair of arms (15) and by said walls (12, 13).

公开(公告)号：US5637934A

公开(公告)日：1997-06-10

申请号：US82292

申请日：1993-06-24

申请人： Gracio Fabris

发明人： Gracio Fabris

IPC分类号： H02K44/08 ,  H02K44/10 ,  H02K44/12

CPC分类号： H02K44/12 ,  H02K44/085 ,  H02K44/10

摘要： Two-phase LMMHD energy conversion systems have potentially significant advantages over conventional systems such as higher thermal efficiency and substantial simplicity with lower capital and maintenance costs. Maintenance of low velocity slip is of importance for achieving high generator efficiency. A bubbly flow pattern ensures very low velocity slip. The full governing equations have been written out, and a computer prediction code has been developed to analyze performance of a two-phase flow LMMHD generator and nozzle under conditions of no slip. Three different shapes of an LMMHD generator have been investigated. Electrical power outputs are in the 20 kW range. Generator efficiency exceeds 71 percent at an average void fraction of about 70 percent. This is an appreciable performance for a short generator without insulating vanes for minimizing electrical losses in the end regions.

摘要翻译： 两相LMMHD能量转换系统比传统系统具有潜在的显着优点，例如较高的热效率和基本的简单性，具有较低的资本和维护成本。 保持低速滑移对于实现高发电机效率至关重要。 气泡流动模式确保了非常低的速度滑移。 已经写出了完整的控制方程，并且已经开发了一种计算机预测代码来分析两相流LMMHD发生器和喷嘴在无滑动条件下的性能。 已经研究了三种不同形状的LMMHD发生器。 电力输出功率在20 kW范围内。 发电机效率在70％左右的平均空隙率下超过71％。 对于没有绝缘叶片的短发电机来说，这是一个可观的性能，用于最小化端部区域的电损耗。

公开(公告)号：US5415529A

公开(公告)日：1995-05-16

申请号：US158883

申请日：1993-11-29

申请人： Laurent Le Boucher ,  Dominique Villani ,  Philippe Marty

发明人： Laurent Le Boucher ,  Dominique Villani ,  Philippe Marty

IPC分类号： F04B17/04 ,  F04B19/04 ,  H02K17/28 ,  H02K41/025 ,  H02K44/06 ,  H02K44/10 ,  H02K44/26

CPC分类号： H02K44/26 ,  H02K41/025 ,  H02K44/06

摘要： The electromagnetic machine (1) includes a tubular duct (3 ) intended to receive a conducting material which can circulate in the duct (3) around the core (4) and an inductor (2) arranged coaxially around the duct (3). The inductor (2) includes a magnetic circuit (15) formed by laminated sheet metal combs (18) and windings (14 ) arranged in annular notches (5 ) made in the magnetic circuit (15). The notches (5) are separated from each other by teeth. The teeth of the inductor have lengths in the axial direction which are smaller in the central part of the inductor (2) than in the end parts. The notches (5) are less deep at the ends than in the central part and enclose windings having a smaller number of turns. The windings (14) are each connected to one phase of a polyphase current source.

摘要翻译： 电磁机器（1）包括管状管道（3），其用于接收围绕芯体（4）在管道（3）中循环的导电材料和围绕导管（3）同轴布置的电感器（2）。 电感器（2）包括由层叠的金属梳（18）和布置在磁路（15）中形成的环形凹口（5）中的绕组（14）形成的磁路（15）。 凹口（5）通过牙齿彼此分开。 电感器的齿在轴向方向上的长度在电感器（2）的中心部分比端部部分小。 切口（5）的端部比中心部分的深度较小，并且包围具有较小匝数的绕组。 绕组（14）各自连接到多相电流源的一相。

公开(公告)号：US4447748A

公开(公告)日：1984-05-08

申请号：US257682

申请日：1981-04-27

申请人： William E. Young ,  Richard H. Lunn ,  David H. Archer

发明人： William E. Young ,  Richard H. Lunn ,  David H. Archer

IPC分类号： H02K44/10 ,  H02N4/02

CPC分类号： H02K44/10

摘要： High temperature corrosion and erosion resistant electrodes particularly useful for magnetohydrodynamic generators which electrodes utilize chemical ionization of combustion reactants to diffuse the current flow into the electrode. A combustible fuel, oxidant and electrically conductive material flow through porous, graded electrode components toward the plasma. Catalyzed combustion occurs near the face of the electrode exposed to the plasma which diffuses current transfer in the boundary layer and into the electrode. The reactants and combustion products thus combine simultaneously to cool the inner portions of the electrode, heat the outer portions, protect the exposed electrode surface from erosion, and alleviate the physical or chemical bonding of the by-products of coal combustion to the electrode surface which otherwise results in chemical degradation of the electrode.

摘要翻译： 高温耐腐蚀和耐腐蚀电极特别适用于磁流体动力发电机，其电极利用燃烧反应物的化学电离使电流流入电极。 可燃燃料，氧化剂和导电材料流过多孔的渐变电极组件朝向等离子体。 催化燃烧发生在暴露于等离子体的电极的表面附近，这扩散了边界层中的电流传递并进入电极。 因此，反应物和燃烧产物同时组合以冷却电极的内部部分，加热外部部分，保护暴露的电极表面免受侵蚀，并减轻煤燃烧副产物与电极表面的物理或化学结合。 否则会导致电极的化学降解。

公开(公告)号：US4118643A

公开(公告)日：1978-10-03

申请号：US768641

申请日：1977-02-14

申请人： Anthony Patrick Coppa ,  Bert Zauderer

发明人： Anthony Patrick Coppa ,  Bert Zauderer

IPC分类号： H02K44/10 ,  H02K45/00

CPC分类号： H02K44/10

摘要： Ceramic electrode is brazed to compliant support, a plurality of curved metal strips mounted on edge, opposite edges being brazed to cooling block. Compliance permits expansion and distortion of electrode when heated without development of stress damaging to brazed joints or to electrode.

摘要翻译： 陶瓷电极钎焊到柔性支撑件上，多个弯曲的金属带安装在边缘上，相对的边缘钎焊到冷却块。 符合性允许加热时电极的膨胀和变形，而不会对钎焊接头或电极产生应力损害。

公开(公告)号：US4111572A

公开(公告)日：1978-09-05

申请号：US776281

申请日：1977-03-10

申请人： Michael J. Noone ,  Arno Gatti

发明人： Michael J. Noone ,  Arno Gatti

IPC分类号： C04B37/02 ,  B23K1/19 ,  B23K31/02 ,  B32B15/04 ,  H02K44/10 ,  F16B11/00

CPC分类号： H02K44/10 ,  B23K31/02 ,  Y10T403/21 ,  Y10T403/472 ,  Y10T403/479

摘要： Magnetohydrodynamic devices using hot ionized gas as working fluid require channel refractories, insulators, and electrodes to be cooled at their reverse sides in order to carry away heat flux fast enough to keep obverse sides below melting point, since gas temperatures of roughly 2500.degree. C. exceed melting points of any available metals or ceramics. Common procedure of brazing ceramic to metal backing (which is more conveniently fastened in apparatus and cooled) creates only partially solvable problem of differential thermal expansion, or bad fit. Ceramic reverse is grooved with dovetailed or convergent slots against which brazing stock is placed for brazing to metal backing. During brazing, molten braze alloy enters grooves and forms mechanical lock which on test proves stronger than ceramic itself. Large expanses of ceramic may be grooved on obverse to insure that cracks resulting from thermal stress, especially thermal shock, will be regular and subdivide surface into smaller regular units which may still be used.

公开(公告)号：US3974108A

公开(公告)日：1976-08-10

申请号：US525064

申请日：1974-11-19

申请人： Ronald Staut ,  Peter E. D. Morgan

发明人： Ronald Staut ,  Peter E. D. Morgan

IPC分类号： H01B1/08 ,  H02K44/10

CPC分类号： H02K44/10 ,  H01B1/08

摘要： A technique of forming electrodes for magneto-hydrodynamic generators having the composition (La.sub.1.sub.-x Y.sbsb.x ) CrO.sub.3 where Y is strontium, calcium or magnesium and having densities of as high as 97% of theoretical or even higher is provided. Electrodes of such densities offer superior mechanical and electrical properties when employed in magneto-hydrodynamic generators.

摘要翻译： 提供了一种用于具有组成（La1-xY + 361）CrO3的磁流体动力发生器的电极的技术，其中Y是锶，钙或镁并且具有高达理论值或甚至更高的97％的密度。 这种密度的电极在用于磁流体动力发电机时具有优异的机械和电学性能。

公开(公告)号：US3614489A

公开(公告)日：1971-10-19

申请号：US3614489D

申请日：1968-01-11

申请人： CARL A JENSEN ,  LOWELL L WOOD JR

发明人： JENSEN CARL A ,  WOOD LOWELL L JR

IPC分类号： H02K44/10 ,  H02N4/02

CPC分类号： H02K44/10

摘要： Improved electrode performance in a magnetohydrodynamic device is obtained with an electrode structure which includes a liquid (molten) portion in electrical contact with the electrically conductive gas stream. The liquid is highly electrically conductive and, when employed as a cathode, it has excellent electron emission characteristics at and These presently employed practical operating temperatures in MHD devices. Tese properties are retained during continuous operation over long periods of time. If both cathode and anode are liquid they may be held in place by rotating the gas flow channel, which supports the electrodes, about its longitudinal axis.

公开(公告)号：US3525000A

公开(公告)日：1970-08-18

申请号：US3525000D

申请日：1967-10-24

申请人： GEN ELECTRIC

发明人： ZAUDERER BERT

IPC分类号： H02K44/10 ,  H02N4/02

CPC分类号： H02K44/10

公开(公告)号：US3490067A

公开(公告)日：1970-01-13

申请号：US3490067D

申请日：1966-05-18

申请人： COMMISSARIAT ENERGIE ATOMIQUE

发明人： FOEX MARC

IPC分类号： C04B35/01 ,  C04B35/12 ,  C04B35/42 ,  C04B35/44 ,  H01B1/08 ,  H02K44/10 ,  C04B35/00 ,  H01B5/00

CPC分类号： H02K44/10 ,  C04B35/01 ,  C04B35/12 ,  C04B35/42 ,  C04B35/44 ,  H01B1/08