59results about How to "Increase turbulent kinetic energy" patented technology

The invention provides a gas jet device of an electric control jet lean-burn natural gas engine and a jet control method. The gas jet device comprises a large flow natural gas nozzle, the nozzle is arranged on a cylinder cover or an air intake manifold, the lower part of the nozzle is provided with a draft tube, the inside diameter of the draft tube is the same as the inside diameter of a nozzle outlet, the center line of the draft tube and the center line of an intake valve are two spatial straight lines which are not mutually parallel or intersected, and post gas pulse in the air intake process passes through an annular gap between the intake valve and a valve seat and is directly sprayed into a cylinder. Through the gas jet control method, mixed gas concentration layers are formed from the top down in the cylinder to ensure reliable combustion of the engine; and the jet pulse is directly sprayed into the cylinder to convert self kinetic energy into turbulent energy in the cylinder so as to quicken the combustion process of the natural gas engine and expand the lean-burn limit of stable running of the engine, thereby improving the dynamic property, economical efficiency and emission performance of the natural gas engine.

Wave fins which are disposed inside a heat exchanger housing of a heat exchanger in order to cause a turbulent flow of fluid through direct contact with the fluid. The wave fins include a plurality of hills, a plurality of valleys and a plurality of sidewalls. The hills and valleys are connected to each other via the plurality of sidewalls. The sidewalls partition fluid passages between the hills and the valleys through which fluid passes. The hills, the valleys and the sidewalls form main waveforms that extend in a longitudinal direction so as to be waved in a first radius of curvature. One or more bent portions are formed on intermediate portions of the main waveforms, the bent portions being connected to remaining portions of the main waveforms so as to be bent at a second radius of curvature.

The invention discloses a fuel nozzle, belonging to a fuel spraying device of an internal-combustion engine fuel system. The fuel nozzle is composed of a needle valve body and a needle valve, wherein the head of the needle valve body is provided with at least one combined spray orifice; each combined spray orifice is composed of at least two sub spray orifices; the cross sections of the sub spray orifices are tangent; and the central lines of the sub spray orifices can be parallel or can be in different planes. Because fuel in the combined orifices can have intense disturbance, turbulence kinetic energy is increased so as to improve atomization; and atomization throughout distance is regulated by changing the injection direction of each sub spray orifice so as to improve flow coefficient. By the arrangement of the spray orifices, internal turbulence intensity is improved, atomization is improved, the throughout distance can be regulated, the spatial distribution range of sprayed mist is expanded, the quality of mixed gas is improved, and the effect of quick, sufficient and complete combustion can be achieved, therefore the economic performance, the emission performance and the power performance of the engine can be further improved.

The invention discloses a heavy natural gas engine combustion system. The system comprises an air cylinder and a cylinder cover covering the air cylinder, the cylinder cover is provided with a composite air inlet channel composed of a vortex air inlet channel and a straight tumble air inlet channel and communicates with the interior of the air cylinder through an air inlet gate provided with an air inlet valve, the air inlet valve is arranged on a valve seat, The air inlet gate is located in the whole valve seat, two exhaust passage inlets communicate with the interior of the air cylinder through exhaust valves arranged on the cylinder cover, a spark plug device is installed in the center of the bottom face of the cylinder cover, a steel piston is arranged in the cylinder cover, and the bottom face of the cylinder cover, the inner wall face of the air cylinder and the top face of the piston define a space which serves as a necking-down type combustion chamber, and gas supply and injection systems are respectively arranged on the two gas inlet channels or the bottom surface of the cylinder cover. The system is simple and compact in structure and convenient in manufacturing and assembly, low heat dissipation is achieved through the steel piston, meanwhile, inlet air flow can form oblique axis vortex around the central axis of the cylinder through the composite air inlet channel, turbulent kinetic energy in the cylinder is improved, and then heat efficiency is improved.

The invention discloses a combustion chamber which is applied to a gas engine. The combustion chamber comprises a piston upper top face located at the top of a piston and a combustion chamber pit sunken downwards relative to the piston upper top face, wherein two flow guide protruding parts protruding towards the inner side of the combustion chamber pit are arranged on the circumferential side wall in the combustion chamber pit, the two flow guide protruding parts are located below two air inlet valves correspondingly, the upper end faces of the flow guide protruding parts are connected with the piston upper top face, and the lower ends of the flow guide protruding parts are connected with the bottom face of the combustion chamber pit. The combustion chamber pit comprises a first flow guide pit located below the exhaust valve and a second flow guide pit located between the two flow guide protruding parts. The first flow guide pit is communicated with the second flow guide pit, and theside surface of the flow guide protruding part forms a smooth transition face between the first flow guide pit and the second flow guide pit. According to the combustion chamber, the tumble intensitycan be enhanced in the compression process, and tumble is violently broken into turbulent flow in the final stage of compression; and therefore the flame spreading speed is increased, and turbulent kinetic energy and heat efficiency are improved. The invention further discloses a gas engine.

The invention relates to a pulsed abrasive flow polishing device and method, and provides a pulse generating device which can generate four different pressure forms. Different tooth forms and tooth spacings are designed, and different mechanical structures are used for generating stable sinusoidal pressure wave, triangular pressure wave, trapezoidal pressure wave and standard sine-cosine pressurewave, so that the effect of increasing the fluid turbulent kinetic energy is achieved, the uniform machining effect is achieved, additionally, different pressure forms are selected according to different material hardness and high-temperature oxidation effects during machining, the characteristics of different kinds of pressure wave are exerted, and the machining effects of high efficiency and economy are achieved.

The invention discloses a system and a process for continuously producing a diazonium salt solution. The system comprises conveying equipment, feeding equipment, a premixing kettle, a diazotization reactor and a finished product kettle which are connected in sequence, the diazotization reactor is a supergravity reactor, a multi-channel structure rotating bed is adopted, channels are arranged in astaggered mode, and connecting nodes between the channels are expanded to form a spherical cavity. The process adopts the system and comprises the following steps: (1) uniformly mixing aromatic amineand a diazotization reagent in the premixing kettle, continuously feeding the aromatic amine into the premixing kettle through conveying equipment and feeding equipment under continuous stirring, anddirectly and continuously conveying the diazotization reagent into the premixing kettle at the same time; and (2) continuously feeding and simultaneously continuously discharging the materials from the premixing kettle, enabling the discharged materials to partially flow back to the premixing kettle and partially enter the diazotization reactor, enabling the aromatic amine and the diazotization reagent to fully react, and continuously discharging the diazonium salt solution generated by the reaction to the finished product kettle.

The invention provides a diesel engine air cylinder cover. The diesel engine air cylinder cover comprises an air cylinder cover (1), an air inlet door (7), an air outlet door (4), an air inlet channel (6), an air outlet channel (3) and an air cylinder cover bottom plane (5). The air inlet door (7) is arranged on the air cylinder cover bottom plane (5). The air inlet channel (6) is communicated with the air inlet door (7) and the air cylinder cover (1). The air outlet door (4) is arranged on the air cylinder cover bottom plane (5). The air outlet channel (3) is communicated with the air outlet door (4) and the air cylinder cover (1). The air cylinder cover bottom plane (5) is further provided with an inclined wedge surface (8) located on one side of the air outlet door (4). The center line of the air outlet door (4) is perpendicular to the inclined wedge surface (8). A cooling water cavity (2) is formed in the air cylinder cover (1). The temperature of the air cylinder cover and the air outlet door can be rapidly and effectively reduced, overheat and corrosion actions brought by high-temperature air can be weakened, and sufficient mixing of air and fuel can be facilitated; and the combustion quality is improved, the accumulated carbon content of exhausted gas is reduced, and the service life of the air cylinder cover is prolonged.

The invention discloses a combustion chamber and a gas engine. The combustion chamber is applied to the gas engine with at least two air inlet throats and at least two exhaust throats; the combustion chamber comprises a combustion chamber pit which is located at the top of a piston and is sunken downwards relative to the upper top surface of the piston, and the intersecting line of the combustion chamber pit and the longitudinal section of the piston is an arc line; a partition convex rib is arranged in the combustion chamber pit, and the partition convex rib extends upwards from the bottom of the combustion chamber pit and divides the combustion chamber pit into two flow guide pits; each flow guide pit comprises an incident flow guide part located below the corresponding air inlet throat and an emergent flow guide part located below the exhaust throat; and the joints of the wall surfaces of the flow guide pits and the partition convex ribs are smooth transition surfaces. Due to the fact that the combustion chamber pit is divided into the two flow guide pits by the partition convex rib, inlet air of the air inlet throats on the two sides forms two strands of large-scale tumble motion opposite in rotation direction in the combustion chamber, improvement of turbulent kinetic energy in the last stage of compression is facilitated, and rapid combustion of the engine is facilitated.

The invention provides a KR desulfurization method. The KR desulfurization method comprises the steps of adding desulfurizer into molten iron contained in an iron ladle, and stirring; wherein the maximum inner diameter of the iron ladle is D, and the height of the iron ladle is H; the distance between the center of a stirring generation area in the vertical direction and the central axis of the iron ladle is 0.10 D to 0.30 D, and the distance between a plane where the bottom of the stirring generation area is located and the top surface of the molten iron is 3/5 H-4/5 H; and in the desulfurization process, a large amount of desulfurizer cannot be agglomerated.

The invention provides an air conditioner indoor unit and an air guide assembly thereof. The air guide assembly is used for being installed at an air outlet of the air conditioner indoor unit so as to guide the air outlet direction of the air outlet, the air guide assembly comprises a plurality of swing blades, each swing blade can be installed at the air outlet in the mode of rotating around the rotating axis of the swing blade, a plurality of notches are formed in the edges of at least two adjacent swing blades, and when the swing blades rotate to be in a coplanar state, the notches of every two adjacent swing blades are opposite in a one-to-one mode so as to be spliced into a plurality of air dissipation openings. The wind-feeling-free effect of air supply airflow of the air conditioner is improved, and the air supply airflow is closer to natural wind.

The invention discloses a novel trailing edge cooling structure with Y-shaped jet holes of a turbine blade. The trailing edge of an integral trapezoidal structure is internally provided with a coolingworking medium supply cavity, a first cooling cavity, a second cooling cavity and an outlet section successively, wherein a first partition plate is arranged between the cooling working medium supplycavity and the first cooling cavity; a second partition plate is arranged between the first cooling cavity and the second cooling cavity; the plurality of uniformly distributed first Y-shaped jet holes are formed in the first partition plate; and the plurality of uniformly distributed second Y-shaped jet holes are formed in the second partition plate. During work, a working medium enters the second cooling cavity successively through the cooling working medium supply cavity and the first cooling cavity, and the working medium after heat exchange is recovered through the outlet section connected to the second cooling cavity. According to the novel trailing edge cooling structure with Y-shaped jet holes of the turbine blade provided by the invention, the trailing edge cooling effect can beenhanced obviously and the pressure loss is reduced.

The invention discloses a combustion chamber and a gas engine, the combustion chamber is used for the gas engine transformed from a diesel engine, the combustion chamber is combined with a weak tumble cylinder cover structure for use, and the combustion chamber comprises a cylinder cover bottom surface and a combustion chamber pit located at the top of a piston; the surface of the combustion chamber pit is a rotary smooth curved surface, the cylinder cover bottom face comprises a rotary arc-shaped cylinder cover pit located above the combustion chamber pit, and the center line of the combustion chamber pit is closer to the exhaust valve relative to the center line of the arc-shaped cylinder cover pit. The combustion chamber is of a good streamline curved surface structure, formation of tumble flow is facilitated, meanwhile, the combustion chamber pits and the arc-shaped cylinder cover pits are asymmetrically designed, energy loss in the tumble flow process can be reduced, turbulent kinetic energy in the combustion chamber is enhanced, the flame propagation speed is increased, and the heat efficiency of an engine is improved.