High-speed airflow speed increasing device

Abstract

To provide a device for accelerating a speed of a high-speed airflow by heat energy the airflow itself has and increasing exercise energy of the airflow.SOLUTION: A high-speed airflow is divided into two, a peripheral flow c is an airflow whose speed increases by passing a pipe whose cross section gradually increases, and a central flow b is an airflow decelerating in a pipe whose cross section gradually decreases. The two airflows are crossed to stably generate a vortex flow at an optimal position where a slow airflow is scraped, and a speed of the entire high-speed airflow is accelerated by increasing the airflow decelerated in the vortex flow.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a device for generating vortices in the flow path of a high-speed airflow, thereby increasing the speed of the high-speed airflow itself. [Background technology]

[0002] As an example of a device for increasing the velocity of high-speed airflow, many devices have been devised to reduce exhaust resistance of an internal combustion engine and increase the efficiency of the engine, and among these, a device that is installed at the rear of the exhaust pipe has been devised that creates a vortex in the exhaust flow, thereby increasing the exhaust flow velocity and increasing the efficiency of the engine (see, for example, Patent Document 1 and Patent Document 2).

[0003] It is also believed that a supersonic nozzle is used to increase the flow velocity (see, for example, Patent Document 3).

[0004] All of the above examples aim to increase engine efficiency by generating negative pressure at the end of the exhaust pipe using vortex flow or the like, thereby drawing out exhaust flow.

[0005] The present invention aims to provide a more effective high-speed airflow acceleration device by examining the operation of the device and adding a structure that optimizes its function. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 09-256845 Title of invention: Exhaust method for internal combustion engine

[0007] [Patent Document 2] Patent Publication No. 2003-206740 Title of invention: Exhaust system for internal combustion engine

[0008] [Patent Document 3] Patent Publication No. 06-173634 Title of invention: Muffler with scavenging promotion effect Summary of the Invention [Problem to be solved by the invention]

[0009] Tornadoes that occur in nature are said to intensify when rotating air currents from the sky land on the ground, and temperature and humidity are also said to have an effect. These phenomena suggest that a fixed object, such as the ground, is necessary for the rotation of the air currents to intensify. A clear example of using a fixed object as a foothold is driving a car on ice. No matter how much horsepower it has, it cannot accelerate.

[0010] The function of the above-mentioned high-speed airflow acceleration device is to accelerate the airflow using the force generated by vortices and negative pressure, but unless the fulcrum that serves as a foothold for this is clear, the force of vortices and the like cannot be used effectively, and good results cannot be expected.

[0011] Another problem with the above method is that when the flow velocity inside the exhaust pipe reaches supersonic speeds, the flow chokes, and the negative pressure and vortex force generated at the end of the pipe do not reach the upstream side due to physical constraints. This is a problem that must be resolved in any device that accelerates high-speed flow downstream.

[0012] In the present invention, a structure that solves the above two problems has been added to make the device more effective than the conventional technology.

[0013] Here, as an example of solving the problem, a device for improving the energy efficiency of an internal combustion engine using the above method will be described. The main method for improving the efficiency of an internal combustion engine is to improve either the intake, combustion, or exhaust. However, this invention utilizes the thermal energy of the high-temperature exhaust flow to increase its flow rate, thereby increasing the intake air volume and thereby improving combustion efficiency. In addition, the increased kinetic energy acts to reduce exhaust resistance, returning energy to the internal combustion engine, thereby reducing fuel consumption and operating costs.

[0014] Furthermore, in organizations that emit CO2, efforts are being made to reduce these emissions as well. [Means for solving the problem]

[0015] The basic objective of the present invention is to generate vortices from a high-speed airflow and increase the speed of the high-speed airflow with the vortices.

[0016] However, without a mechanism to prevent the choking phenomenon of supersonic airflow, which was an issue, or a support mechanism to support the vortexes and negative pressure themselves, the effect of increasing speed due to the suction force of vortices and other factors downstream cannot be achieved.

[0017] This choking phenomenon was prevented by slowing down the high-speed airflow by passing it through a tapered tube with a gradually decreasing cross-sectional area.

[0018] Furthermore, the establishment of a fulcrum for the vortex and negative pressure was achieved by utilizing the Coanda effect, which causes high-speed airflow to adhere to the wall, and creating a surface onto which the vortex adheres, thereby generating the vortex in a fixed position.

[0019] Furthermore, the speed of the airflow was increased by using a tube with a gradually expanding cross-sectional area to create a supersonic nozzle, which was achieved by the nozzle's function of converting heat and kinetic energy. [Effects of the Invention]

[0020] The high-speed airflow acceleration device of the present invention can accelerate the exhaust flow of an internal combustion engine, for example, and significantly reduce operating costs. As an example, the device was installed inside the exhaust port of a car as shown in Figure 3, and the following verification results were obtained by actually driving the car.

[0021] Demonstration method: The device of the present invention was installed in the end of the exhaust pipe of an actual automobile to confirm its effect of reducing fuel consumption. All tests were conducted on the same route of 35 km or more on public roads, and fuel consumption was measured using the full tank method (a method based on the position of the fuel tank filler cap). The values ​​of the demonstration results are expressed as the distance traveled per liter of fuel and are the average of multiple tests.

[0022] Test vehicle 1: Mazda gasoline direct injection engine with a displacement of approximately 2000cc Test vehicle 2: Mazda diesel engine with a displacement of approximately 1800cc Test conditions: One occupant, test vehicle is a well-maintained vehicle with no modifications, mileage less than 20,000 km, temperature at the time of testing is above 25°C

[0023] result Test vehicle 1 Without device Approx. 16km / l With device Approx. 24km / l Test vehicle 2 Without device Approximately 22km / l With device Approximately 33km / l

[0024] As described above, both test vehicles 1 and 2 saw a reduction in fuel consumption of approximately 50%, confirming the effectiveness of this invention as an example.

[0025] The effectiveness of the surface that steadily generates vortex flows, which is a feature of the present invention, has been confirmed by the fact that the above results cannot be obtained at all when such a surface is not present, using the same method as above.

[0026] However, the test conditions require that the temperature be high, as current automobile exhaust gas purification devices require high temperatures, and tend to consume extra fuel when the temperature is low, which is thought to result in completely different test values.The above test also confirmed that the higher the temperature, the greater the reduction in fuel consumption.

[0027] Furthermore, because this device forcibly promotes exhaust from the internal combustion engine, it can only be used with direct injection internal combustion engines, as with other types, unburned gas is emitted when the intake and exhaust valves open at the same time. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a cross-sectional view of the present invention. [Figure 2] FIG. 2 is an enlarged view visually showing the airflow of each part in FIG. 1. [Figure 3] 1 is a diagram of an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0029] The specific mechanism when the present invention is used in, for example, a heat engine will be shown below using Figures 1 and 2. Both Figures 1 and 2 show the present invention, but Figure 2 visually shows the noteworthy air flow of the present invention. Also, the support rod 5 is omitted in Figure 2.

[0030] The exhaust flow a from the heat engine that passes through the exhaust pipe 1 is divided into a central flow b and a peripheral flow c by a throttle pipe 2 fixed to the exhaust pipe 1 by a support rod 5.

[0031] The central flow b is narrowed by the pipe 2, so the flow speed slows down and the pressure increases, and it flows out from the low-speed flow nozzle 3 as a jet flow e.

[0032] As the peripheral flow c passes through the gradually expanding space formed by the exhaust pipe 1 and pipe 2, its speed increases and its pressure decreases, and part of it becomes a longitudinal flow d that flows along the wall surface of pipe 2 toward the low-speed flow outlet 3.

[0033] When the jet flow e and the along flow d intersect near the low-speed jet outlet 3, an accelerated vortex flow f is generated while being attracted to the vortex fixing surface 4.

[0034] Since this accelerated vortex flow f is faster than the ejection flow e, it acts to draw out the ejection flow e, thereby increasing the flow rate of the central flow b in the throttle pipe 2 and, accordingly, increasing the flow rate of the exhaust flow a.

[0035] As a result, the velocity of the exhaust flow a increases and the target is achieved. [Example]

[0036] An actual embodiment is shown in Figure 3. This shows the product of the present invention installed at the end of an exhaust pipe of an actual automobile. [Industrial Applicability]

[0037] Since the present invention is directed to the acceleration of relatively fast-flowing high-speed airflow, it is expected to bring about energy and cost savings in fields such as high-speed transportation such as aircraft and wind turbines. [Explanation of symbols]

[0038] 1 exhaust pipe 2. Constrictor tube 3 Slow flow outlet 4 Eddy current fixed surface 5 Support rod a Exhaust flow b Central flow c Peripheral flow d along the stream e jet stream f Accelerated vortex

Claims

1. A high-speed airflow enhancer that generates an airflow with increased pressure and decelerated speed by passing the high-speed airflow through a tapered tube whose cross-sectional area gradually decreases.

2. A high-speed airflow acceleration device that generates an accelerated flow by passing a high-speed airflow through a pipe whose cross-sectional area gradually increases.

3. 3. A high-speed airflow increasing device according to claim 2, characterized in that the direction of the generated airflow is changed by passing it along a curved surface or through a pipe or the like.

4. 10. A high-speed airflow increasing device characterized by generating a vortex by intersecting two airflows, one decelerated as claimed in claim 1 and the other accelerated as claimed in claim 2.

5. 5. A high-speed airflow increasing device characterized in that a surface for stably generating the position of the generated vortex flow as claimed in claim 4 is provided at the outlet of the tapered pipe as claimed in claim 1.

6. 6. A high-speed airflow increasing device characterized in that the flow at the outlet of the tapered pipe of claim 1 is scraped out by the vortex flow generated on the surface of claim 5 as claimed in claim 4.

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