Hydraulic propeller enhancement method

Abstract

The present invention relates to a hydraulic propeller enhancement method for enhancing the propelling force of a hydraulic propeller. The present invention uses a gas release outlet in the propeller at the area where the high-speed axial flow of water passes for guiding in a gas by means of a negative pressure subject to Bernoulli's principle. Thus, subject to Bernoulli's principle, gas compressible characteristic and Boyle's law and the arrangement of the contracted end piece of the nozzle to work as an air compressor for compressing air bubbles, the invention uses one single gas guide device and a negative pressure suction force to guide in air bubbles to enhance the propelling force of the hydraulic propeller.

1 . A hydraulic propeller enhancement method, comprising the step of:
 a) providing a boat and then installing a hydraulic propeller in said boat, wherein said hydraulic propeller comprises a power engine, a water passage, a propeller rotatably accommodated in said water passage and rotatable by said power engine to cause a high-speed axial flow of water, a nozzle located on an outlet of said water passage and terminating in a contracted end piece;   b) installing at least one gas release outlet in said hydraulic propeller at a selected area said high-speed axial flow of water passes;   c) providing a gas guide device comprising at least one guide pipe arranged at a selection location in said boat and connecting a bottom end of said at least one guide pipe to said at least one gas release outlet;   d) employing Bernoulli's principle to produce a negative pressure in said at least one gas release outlet in said hydraulic propeller within the area where said high-speed axial flow of water passes for sucking in outside air during rotation of said propeller;   e) enabling the intake flow of air to be guided by said at least one guide pipe into said at least one gas release outlet to mix with water and to produce air bubbles; and   f) subject to compressible gas characteristic, the air bubbles thus produced pass through said contracted end piece of said nozzle are compressed to reduce the size, and the compressed air bubbles expand suddenly subject to a pressure difference between the inside of said contracted end piece and the outside of said nozzle when going out of said nozzle, thereby enhancing the propelling force of said hydraulic propeller.   
     
     
         2 . The hydraulic propeller enhancement method as claimed in  claim 1 , wherein said at least one gas release outlet is located on the peripheral wall of said water passage for the connection of said at least one guide pipe of said gas guide device. 
     
     
         3 . The hydraulic propeller enhancement method as claimed in  claim 1 , wherein said at least one gas release outlet is located on the peripheral wall of said nozzle for the connection of said at least one guide pipe of said gas guide device. 
     
     
         4 . The hydraulic propeller enhancement method as claimed in  claim 1 , wherein said hydraulic propeller further comprises a directional nozzle connected to a distal end of said nozzle; said at least one gas release outlet is located on the peripheral wall of said directional nozzle for the connection of said at least one guide pipe of said gas guide device. 
     
     
         5 . The hydraulic propeller enhancement method as claimed in  claim 1 , wherein said propeller comprises an axial tube having an inner end connected to said at least one guide pipe of said gas guide device and an outer end extended to said at least one gas release outlet located on the outer surface of said propeller. 
     
     
         6 . The hydraulic propeller enhancement method as claimed in  claim 1 , wherein said at least one guide pipe of said gas guide device has a top end thereof terminating in a gas inlet and disposed in said boat above the water line. 
     
     
         7 . The hydraulic propeller enhancement method as claimed in  claim 6 , wherein said gas guide device uses a supplementary measure to guide engine waste gas or low pressure gas from the steam turbine into said at least one guide pipe of said gas guide device for generating air bubbles. 
     
     
         8 . The hydraulic propeller enhancement method as claimed in  claim 7 , wherein said gas guide device further compresses a pressure device for pumping a gas into said at least one guide pipe toward said at least one gas release outlet, said pressure device being selected from an air compressor, an air blower, an engine, a steam turbine and a turbo of said boat.