Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/91341
標題: Analysis of the dynamic Apex seal leakage of Wankel Engine
轉子引擎動態氣封洩漏分析
作者: 許右龍
Yu-Lung Hsu
關鍵字: Wankel Engine
cylinder pressure
seal leakage
seal gap
轉子引擎
汽缸壓力
氣封洩漏
氣封間隙
引用: [1] http://www.rotaryforum.com/forum/showthread.php?t=11674 Rotary Wing Forum - Equipment-Parts & Components [2] http://www.uavenginesltd.co.uk/products UAV Engines Ltd - AR741 [3] D. Eiermann, R. Nuber, J. Breuer, M. Soimar & M. Gheorghiu, 'An Experimental Approach for the Development of a small Spark Assisted Diesel Fueled Rotary Engine,' International Congress and Exposition, Detroit, Michigan, SAE Paper NO. 930683, 1993. [4] P. A. Salanki & J. S. Wallace, 'Evaluation of the Hydrogen-Fueled Rotary Engine for Hybrid Vehicle Applications,' SAE International Congress and Exposition, Detroit, Michigan, February 26-29 SAE Paper NO. 960232, 1996. [5] K. M. Pillai, A. J. S. Mithran, V. K. W. Grips, K. S. Kumar, U. K. Sinha, M. N. Varadarajan, J. J. Isaac & Y. V. S. Murthy, 'Design And Development of an Indignous 55 hp Wankel Engine', Proceedings of the International Conference on Aerospace Science and Technology 26 - 28 June 2008, Bangaloire, India. [6] M. Ohkubo, S. Tashima, R. Shimizu, S. Fuse & H. Ebino, 'Developed Technologies of the New Rotary Engine(RENESIS)', 2004 SAE World Congress, Detroit, Michigan, SAE Paper NO. 2004-01-1790, 2004. [7] http://www.okura-auto.co.jp/rw/museum/bike/bike.html Okura Auto Service - RE [8] http://nationalspeedinc.com/advantages-and-disadvantages-of-a-rotary-engine Advantage And Disadvantage of a Rotary Engine [9] H. L. Nguyen, H. E. Addy, T. H. Bond, C. M. Lee & K. S. Chun, 'Performance and Efficiency Evaluation and Heat Release Study of an Outboard Marine Corporation Rotary Combustion Engine', NASA Technical Memorandum 89833. [10] O. Badr, S. Naik, P. W. O'Callaghan & S. D. Probert, 'Rotary Wankel Engines as Expansion Devices in Steam Rankine-Cycle Engines' Applied Energy 39 (1991) 59-76. [11] M. Antonelli, R. Lensi & L. Martorano, 'Development and validation of a numerical model of a rotary steam engine for electric power micro generation using biomass', Department of Energetica, University of Pisa, Pisa, Italy, marco.antonelli@ing.unipi.it. [12] C. Vilmann, 'Deformation Analysis of Rotary Combustion Engine Housings', Final Report on NASA Grant NAG 3-456. [13] D. A. Blank, 'Hydrogen Combustion in a Novel Rotary DI-HCRI Engine with Low Heat Rejection', SAE International 2007 World Congress Detroit, Michigan April 16-19, SAE Paper NO. 2007-01-1254. [14] C. M. Lee & H. J. Schock, 'Regressed Relations for Forced Convection Heat Transfer in a Direct Injection Stratified Charge Rotary Engine', NASA Technical Memorandum 100124. [15] S. Bradley, 'Finite Element Modeling of a Wankel Engine Center Housing', a thesis Submitted in partial fulfillment of the requirements for the degree of Master of Science In Engineering Mechanics 1985. [16] T. Resch, C. Schweiger, G. Offner & Y. Miyauchi, 'Numerical Investigation in Rotor Motion and Elasto-Hydrodynamic Rotor Bearing Behavior of a Rotary Engine Using Flexible Multi-Body Dynamics', 2007 World Congress Detroit, Michigan April 16-19, 2007 SAE 2007-01-1459. [17] G. W. Finger, J. S. Kapat & L. C. Chow, 'DESIGN AND ANALYSIS of a Miniature Rotary Wankel Compressor' Department of Mechanical, Materials and Aerospace Engineering University of Central Florida, Orlando, FL 32816-2450. [18] R. Shimizu, H. Okimoto, S. Tashima & S. Fuse, 'The Characteristics of Fuel Consumption and Exhaust Emission of the Side Exhaust Port Rotary Engine',1995 SAE International Congress and Exposition, Detroit, Michigan, SAE Paper, 1995. [19] T. Muroki, Y. Moriyoshi & M. Takagi, 'Combustion Characteristic of a Direct Injection Stratified Charge Rotary Engine Using Spark Ignition and Pilot Flame Ignition Systems', SAE, 2002-31-179. [20] J. Heppner & F. Martinez, 'Apex Seals for a MENS Rotary Engine', University of California, Berkley. [21] K. Masuura, K. Terasaki & I. Watanabe, 'The behavior of a Rotary Engine Apex Seal against the Trochoidal Surface', Bulletin of the JSAE, Vol. 21, No. 161, November, 1978. [22] P. Drogosz, 'Trajectory of the Apex Seals of the Wankel Rotory Engine', Journal of Kones Powertrain and Transport, Vol. 18, No.2 2011. [23] J. Knoll, C. R. Vilmann, H. J. Schock & R. P. Stumpf,'A Dynamic Analysis of Rotary Combustion Engine Seals', NASA Technical Memorandum 83536. [24] A.K.N. Gerami, M.S. Schadloo, M. Ghasempour & A. Kimiaeifar, 'Analysis of the Force Acting on Apex Seal of A Wankel Engine', Australian Journal of Basic and Applied Sciences, 4(9):4205-4212, 2010, ISSN 1991-8178. [25] K. Yamamoto,'Rotary engine', Sankaido Co. Ltd., Hiroshima , 1981. [26] F. Amrouche, P. Erickson, J. Park, S. Varnhagen, 'An experimental investigation of hydrogen enriched gasoline in a Wankel rotary engine', International Journal of Hydrogen Energy 39, 2014,8525-8534 [27] W. M. Lychl'k, 'Development of a Preprocessor That Generates Finite Element Models of Rotary Combustion Engine Center Housings' A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science In Mechanical Engineering 1985. [28] B. V. Padmarajan, 'Numerical Modelling and Simulation of Rotary Engine', 2004, MSc Thesis. [29] O. Badr, S. Naik, P. W. O'Callaghan & S. D. Probert, 'Wankel Engines as Steam Expanders: Design Considerations', Applied Energy 40 (1991) 157-170. [30] 吳宗哲,盧昭暉,Wankel Compressor性能分析與設計參數探討,國立中興大學機械工程研究所第九屆全國機構與機器設計學術研討會,8.2006。 [31] 郭奇亮,UAV轉子引擎熱傳特性分析與量測,國立中興大學機械工程研究所,碩士學位論文,8.2008。 [32] 馮俊宇,UAV Wankel 燃油噴射式引擎之設計與製作,國立中興大學機械工程研究所,碩士學位論文,12.2008。 [33] 楊建楷,UAV轉子引擎氣封洩漏分析,國立中興大學機械工程研究所,碩士學位論文,7.2014。 [34] http://commons.wikimedia.org/wiki/File:Wankel_Cycle.gif Wankel engine by Wikimedia [35] http://www.personal.utulsa.edu/~kenneth-weston/chapter7.pdf Chapter 7 'The Wankel Rotary Engine' 20d09-05-19
摘要: The research investigates the variation of the seal gap and leakage of Wankel engine. A test platform is built to operate Wankel engine without ignition and analyze the performance index of Wankel engine. In the experiment installation, the pressure sensor is installed in the position of spark plug. The servo motor and the driver motivate Wankel engine. The rotation speed is considered as a variable parameter. The volume of the leakage and the variation of the seal gap can be calculated from the cylinder pressure variation, which is related to rotation angle. In this research, Apex seal is the only circumstance we considered. The experiment is carried in steady state, when the engine rotates with five speed, 400rpm, 800rpm, 1200rpm, 1600rpm and 2000rpm. The result shows that the variation of the seal gap mainly occurs in compression and expansion. When rotation angle is in the top dead center, the seal gap barely changes. The higher the rotation speed is, the smaller the seal gap is and the less performance loss is. Conversely, low rotation speed results in wide seal gap, which leads to severe leakage. The max seal gap is 5.87E-3mm in compression and 4.35E-3mm in expansion when the engine speed is 400mm. When the engine speed is 2000 rpm, the maximum seal gap is 1.29E-3mm mm in compression and 9.38E-4mm in expansion. Only 26.5% seal gap when engine speed is 400rpm. And after comparing with the housing force, the result shows that, when the engine speed is 800rpm, the housing force increases 21.1% in the top dead center, the seal gap decreases 37.7% as compared with 400rpm; when the engine speed is 1200rpm, the housing force increases 31.0% in the top dead center, the seal gap decreases 58.3% as compared with 400rpm; when the engine speed is 1600rpm, the housing force increases 36.7% in the top dead center, the seal gap decreases 79.2% as compared with 400rpm; when the engine speed is 2000rpm, the housing force increases 43.2% in the top dead center, the seal gap decreases 85.4% as compared with 400rpm.
本研究目的為探討UAV轉子引擎氣封間隙與洩漏變化情形,利用建立之一座轉子引擎測試平台,並執行轉子引擎動態無點火模式之洩漏測試實驗,及轉子引擎性能參數分析。 本研究進行轉子引擎動態測試實驗,於火星塞位置裝置汽缸壓力計,利用伺服驅動器與伺服馬達帶動轉子引擎運轉,透過調整不同引擎轉速,分析不同轉速下汽缸壓力的變化情形,並推算轉子引擎在各角度的氣封洩漏量與氣封間隙變化,而本研究僅針對Apex seal於轉子引擎運轉過程中的洩漏情形做討論。實驗操作於引擎穩態狀況下進行實驗量測,分別使用400rpm、800rpm、1200rpm、1600rpm及2000rpm,共五組不同之轉速量測。 由分析結果得知,Apex seal之氣封間隙變化主要發生於壓縮段與膨脹段位置,上死點位置氣封間隙變化非常小。而當引擎轉速越高,氣封間隙也會越小,表示洩漏程度越低,性能損失少;反之,轉速越低氣封間隙越大,造成較為嚴重的洩漏。當轉速為400rpm時,壓縮段之最大氣封間隙約為5.87E-3mm,膨脹段之最大氣封間隙約為4.35E-3mm;而當轉速為2000rpm時,壓縮段之最大氣封間隙約為1.29E-3mm,膨脹段之最大氣封間隙約為9.38E-4mm,只有400rpm之氣封間隙26.5%。而氣封間隙與缸壁作用力比較後可知,當引擎轉速800rpm時,上死點作用力較400rpm提升21.1%,氣封間隙減少37.7%;當引擎轉速1200rpm時,上死點作用力較400rpm提升31.0%,氣封間隙減少58.3%;當引擎轉速1600rpm時,上死點作用力較400rpm提升36.7%,氣封間隙減少79.2%;當引擎轉速2000rpm時,上死點作用力較400rpm提升43.2%,氣封間隙減少85.4%。
URI: http://hdl.handle.net/11455/91341
文章公開時間: 2015-08-31
Appears in Collections:機械工程學系所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.