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Two Small Prototype Engines Developed based on Pulsed Supermulti-Jets Colliding: Having a Potential of Thermal Efficiency Over 60% with Satisfactory Strength of Structure
Technical Paper
2014-32-0099
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In our previous reports based on computations and fluid dynamic theory, we proposed a new compressive combustion principle for an inexpensive and relatively quiet engine reactor that has the potential to achieve thermal efficiency over 50% even for small combustion chambers having less than 100 cc. This can be achieved with colliding supermulti-jets that create complete air insulation to encase burned gas around the chamber center. We originally developed two small prototype engine systems for gasoline. First one with one rotary valve for pulsating intake flow and sixteen nozzles of jets colliding has no pistons. Next, we developed the second one having a strongly-asymmetric double piston system with the supermulti-jets colliding, although there are no poppet valves. The second prototype engine can vary point-compression strength due to the supermulti-jets and homogeneous compression level due to piston, by changing phase and size of two gears. A motoring test done for evaluating the strength of structure shows that this engine stably works over 4000rpm. Experimental data of combustion with a starter motor indicates a possibility of stable engine start for gasoline without any plugs and thermal efficiency of the order of traditional piston engines or a little more.
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Authors
- Ken Naitoh - Waseda University
- Daiki Ikoma - Waseda University
- Hiroki Sagara - Waseda University
- Taro Tamura - Waseda University
- Taiki Hashimoto - Waseda University
- Yoshiyuki Nojima - Waseda University
- Masato Tanaka - Waseda University
- Kentaro Kojima - Waseda University
- Kenya Hasegawa - Waseda University
- Takuya Nakai - Waseda University
- Shouhei Nonaka - Waseda University
- Tomoaki Kubota - Waseda University
Citation
Naitoh, K., Ikoma, D., Sagara, H., Tamura, T. et al., "Two Small Prototype Engines Developed based on Pulsed Supermulti-Jets Colliding: Having a Potential of Thermal Efficiency Over 60% with Satisfactory Strength of Structure," SAE Technical Paper 2014-32-0099, 2014, https://doi.org/10.4271/2014-32-0099.Also In
References
- Kerrebrock JL. Aircraft Engines and Gas Turbines MIT Press Cambridge, MA 1 494 1992
- Takagi , Y. , Itoh , T. , Muranaka , S. , Iiyama , A. et al. Simultaneous Attainment of Low Fuel Consumption High Output Power and Low Exhaust Emissions in Direct Injection SI Engines SAE Technical Paper 980149 1998 10.4271/980149
- Kailasanath , K. Review of Propulsion Applications of Detonation Waves AIAA Journal 39 9 1698 1708 2000
- Jackson TA. Power for a Space Plane ScientificAmerican 295 2 56 63 2006
- Kitahara K. Nonequilibrium statistical physics Iwanami Kanda, Japan 1997
- Naitoh K and Kuwahara K. Large eddy simulation and direct simulation of compressible turbulence and combusting flows in engines based on the BI-SCALES method Fluid Dynamics Research 10 299 325 1992
- Naitoh , K. Engine 2010 2011
- Naitoh K. A New Cascade-Less Engine Operated from Subsonic to Hypersonic Conditions J. of Thermal Science 19-6 481 485 2010
- Naitoh K , Shinimu D , Nonaka S , Kainuma Y , and Emoto T. The fifth compression strategy for hypersonic aircar AIAA paper 2012-3314 2012
- Naitoh K , Shimizu D , Nonaka S. Stability limit of supermulti-jets convergence engine operated from startup to extremely-hypersonic conditions: revealed by shock-tube experimens AIAA paper 2012-5923 2012
- Naitoh K. et al. Supermulti-jets colliding for the ultimate engine Proceedings of COMODIA Hakata 2012
- Naitoh K , Iseno M , Shimizu D , Nonaka S , Kubota T , and Ishida K. The ultimate engine based on supermuti-jets colliding with pulsation: Stability analysis on the compression and proposal of the system for actual use Proceedings of the 23rd Internal Combustion Engine Sympodium Sapporo 2012
- Naitoh K. The ultimate engine OHM 2012
- Outa E. , Tajima K , Saito M Shougekihakan no kakumaku no kaikounitomonaunijigenryuu. Dai-ippou Transaction of Japan Society of Mechanical Engineering 41 352 3515 3525 1975
- Outa E , Matsuda E , Tajima K Shock Tube Study on Non-Equilibrium Wall Condensation of a Super-Heated Freon Vapor Flow Proc. 16th Int. Symp. Shock Tubes and Waves 289 295 1988
- Jacobsen LS , Tam CJ , Behdadnia R , Billing FS. Starting and operation of a streamline-traced Busemann inlet at Mach 4 AIAA paper 2006-45-8 2006
- Naitoh K. , Nakamura K. , Emoto T. , and Shimada T. A Wide-range Single Engine: operated from startup to hypersonic AIAA paper 2011-2316 2011
- Naitoh , K. , Emoto , T. , Nakamura , K. , and Kainuma , Y. An Ultimate Engine: designed by Computational Fluid Dynamics SAE Technical Paper 2011-01-2027 2011 10.4271/2011-01-2027
- Landau ED and Lifshitz EM. Fluid mechanics 2nd Butterworth-Heinemann Elsevier Oxford 2004
- Naitoh K et al. Simultaneous attainment of light-weight, high efficiency, and low noise: by supermultijets-twister engine working from startup to hypersonic scram mode AIAApaper 2013-3011 2013
- Shinmura N , Kubota T , Naitoh K. Cycle-resolved computations of stratified-charge turbulent combustion in direct injection engine JSME International Journal. Journal of Thermal Science and Engineering 8 1 2013
- Naitoh K and Shimiya H Stochastic determinism capturing the transition point from laminar flow to turbulence Japan Journal of Industrial and Applied Mathematics 2011 Proc. of 6th Int. Symposium on Turbulence and Shear Flow Phenomena (TSFP6) 2009
- Naitoh K , Ryu k , Matsushita S , Tanaka S , Kurihara M , Marui M Weakly-stochastic Navier-Stokes equation and shocktubeexperimenys: revealing the Reynolds' mystery in pipe flows AIAApaper 2012-2689 2012
- Korobeinikov V.P. Propagation of Blast Waves in a Combustible Gas AstronamicaActa 17 529 537 1972
- Takewaki H , Nishiguchi A , and Yabe T. The cubic-interporlatedPreudo-Particle (CIP) method for solving Hyperbolic-type equations J. of Comp. Physics 61 261 1985
- Nakajima Y et al. Automobile gasoline engine Sankaido 1999
- Tatsumi T. Fluid mechanics Baifu-kan 1998
- Thompson . K.W. Time-Dependent Boundary Condition for Hyperbolic Systems II J. of Comput. Phys 89 436 1990
- Kato A. , Misawa S. , Yoshimatsu A. Nakamura M. , and Sawada D. A Study of Rising Thermal Efficiency Using an Argon Circulated Hydrogen Engine (Third Report) JSAEpaper 20135721 2013
- Hashimoto T. , Naitoh K et al. Strongly-asymmetric Double Piston Engine: Assisted by Super Multi-jets Colliding JSAEpaper 81-20135740 2013
- Tamura T. , Naitoh K et al. Fundamental Combustion Test Based on Supermulti-jets Colliding 24 th Nainen-kikan symposium Kobe 2013
- Tanaka M. , Naitoh K. et al. Strongly-symmetric Double Piston Engine: Assisted by Super Multi-jets Colliding 24 th Nainen-kikan symposium Kobe 2013
- Asia Innovation Forum 2013 (AIF2013) http://www.aif21c.com/ Tokyo 2013
- Nishijima , Y. , Asaumi , Y. , and Aoyagi , Y. Premixed Lean Diesel Combustion (PREDIC) using Impingement Spray System SAE Technical Paper 2001-01-1892 2001 10.4271/2001-01-1892
- Naitoh K , Ishida K , Nonaka S , Kubota T et al. Fugine: the supermultijet-convergence engine working from startup to hypersonic scram mode and attaining simultaneously lightweight, high-efficiency, and low noise AIAA paper 2014-3960 2014
- Naitoh , K. , Hasegawa , K. , Kubota , T. , Hashimoto , T. et al. Development Of Fugine Based on Supermulti-Jets Colliding with Pulse: Leading to Stable Plug-Less Start and Improvement of HCCI with Satisfactory Strength of Structure SAE Technical Paper 2014-01-2639 2014 10.4271/2014-01-2639