The Self-Propelled Model of a Boat, Based on the Wave Thrust

We attempted investigate a boat model, based on the conversion of energy of surface wave into a sequence of unidirectional pulses of jet spurts, in other words - model of the boat, which is thrusting by the waves field on water surface. These pulses are forming some average reactive stream from the output nozzle on the stern of boat. The suggested model provides the conversion of its oscillatory motions (both pitching and rolling) into a jet flow. This becomes possible due to special construction of the boat and due to several details, sensitive to the local wave field. The boat model presents the uniflow jet engine without slow conversions of mechanical energy into intermediate forms and without any external sources of energy (besides surface waves). Motion of boat is characterized by fast jerks and average onward velocity, which exceeds the velocities of liquid particles in the wave.

Authors:

• V. Arabadzhi

Keywords:

• Flat-bottomed boat
• Underwater wing
• Input and output nozzles
• Wave thrust
• Conversion of wave into a jet stream
• Oscillatory motion and onward motion
• Squid-like pump
• Hatch-like pump
• The thrust due to lifting float
• The thrust due to radiation reaction.

References:

[1] I. .I. Blekhman, Vibrational Mechanics, Moscow: Fizmatlit Publishing
Company, 1994.
[2] V. P. Boldin, A.I. Vesnitsky, E.E. Lissenkova, "An elementary wave
propeller," Dokl. Akad. Nauk SSSR. vol. 318, no. 4, pp. 849-852, 1992.
[3] A. I. Vesnitsky, N.D. Romanov, G.A. Utkin, "About an efficiency wave
propeller," Dokl. Akad. Nauk SSSR. vol. 306, no. 4, pp. 810-811, 1989.
[4] M. A. Lavrent-ev, B.V. Shabat, Hydrodynamics Problems and their
Mathematical Models, Moscow: Science, 1977.
[5] V. V. Arabadzhi, "Wave-jet converters," Journal of Low Frequency
Noise and Vibration and Active Control, vol. 21, no. 2, pp. 101-116,
Apr. 2002.
[6] V. V. Arabadzhi, "On the conversion of boat pitching into a wave
propulsion," Proc. 1-st WSEAS Int. Conf. MN-08, pp. 158-164, 2008.
[7] L. F. Kozlov, The Theoretical Bio-Hydrodynamics, Kiev, Head
publishing holding "Visshaya shkola", 1983 (edited by N.T.
Romanenko).
[8] V. G. Chikarenko, A. G. Gavryushin, "Efficiency of winged wave
propeller devices," Morskoi Flot, no. 5-6, p. 22, 1994.
[9] G. E. Pavlenko, "Wave energy as a means of ship propulsion,"
Sudostroenie, no. 6, p. 394, 1936.
[10] I. K. Borodai, Yu. A. Netsvetaev, Wave Motion of Ships, Leningrad:
Sudostroenie, 1969.
[11] Shigeru Naito, "Effect of bow wings on ship propulsion and motions",
Appl. Mech. Rev., vol. 58, no. 4, 253-269, July 2005.
[12] http://www.utro.ru/news/2008/03/17/724180.shtml
[13] http://www.ecofuss.com/wave-propeller-boat-isnt-fast-but-loves-theenvironment/
[14] http://nauka.relis.ru/17/9806/17806106.htm
[15] http://ru-patent.info/20/30-34/2034739html
[16] G. A. Konstantinov, Yu. L. Yakimov, "Calculation of the thrust of a
wave-powered marine propelling device," Fluid Dynamics, vol. 30, no.
3, pp. May 453-456, 1995.
[17] James Lighthill, Waves in Fluids, Cambridge: University Press,
Cambridge-London-New-York-Melbourne, 1978.
[18] M. E. McIntyre., "Myth of wave impulse", Journal of Fluid Mechanics,
vol. 106, May 1981.
[19] L. N. Sretenski, Theory of Liquid Wave Motions, Moscow: Science,
Phis.-Math. Publishing company, 1977.