Technical Field

The present invention relates to underwater power generation turbine with airfoil crosssection embodiment used for generating more power from currents such as sea, river, irrigation canals etc.

Present State of the Art

Tidal turbines apply resistance to fluid in the area of current corresponding to area scanned by wheel. Tidal turbine geometry which is one of applications of today technology generate much resistance and yield low efficiency in same scanning area. The reason behind it is that the resistance generated by it forms barrier effect and it means obtaining less benefit from existing stream. For that reason, since tide does not change direction and chose path of less resistance but uses a scanning area of such resistance, profitability of investment decreases when benefit cost relation is considered.

Initial investment costs of tidal turbine systems are high and because of low efficiency of turbine systems of conventional geometry, system amortisation times take many years.

In case of using turbine systems having application in today technology for the purpose of generating power from tides in seas;

- It is seen that in general current regimes of passages such as canal, straits can also be used.

- Such applications are not common in inland seas. The reason thereof is that currents in such seas are slower and narrower. Tide changes direction in case of resistance more than adequate in currents (barrier effect).

- When it is intended to get maximum benefit from existing current, current changes direction because of extreme resistance generation, and it is highly likely to damage ecologic balance and lose investment.

- Or scanning area to generate less resistance is scaled, which means an investment that will not provide benefit in comparison to high installation costs. Tidal turbine systems having applications in today technology, liquid changes phase because pressure difference between high pressure areas of blade geometries and low pressure areas thereof is too high, and goes into gas phase behind blade, (cavitation). This causes drive loss and results in decrease in efficiency and cavitation has destructive effect on blade surface in long run, which affects investment costs negatively.

Abstract of application numbered TR2020/05292 encountered when the related field is searched reads as:” Purpose of this invention is to provide high energy generation by use of currents in rivers. System is designed to be hidden in water and generate electricity from current. Particularly, the fact that irrigation costs on river sides are high affects agriculture based production of our country adversely. The invention is a floating double generator group type tidal turbine and floats on rivers and converts current power into electricity.”

As seen, system relates to a floating double-generator group type tidal turbine but does not disclose an embodiment that can solve above mentioned disadvantages.

As a result, due to above described disadvantages and inadequacy of existing solutions it has been necessary to make development in the related art.

Purpose of the Invention

Differently from the existing related art, the invention aims to disclose an embodiment having different technical features providing a new solution.

Primary purpose of the invention is to provide less resistance generation by help of design of invention and thus generate more torque from current in same scanning area.

Another purpose of the invention is to generate more efficient power without damaging ecological balance and make underwater power generation investment profitable.

A further purpose of the invention is to minimize disadvantages of turbine systems having existing current turbine geometry (high resistance, low torque capability, cavitation due to pressure difference between blade pressure area, arising out of geometric embodiments) and disclose a ecology friendly and high efficient system in the same working area . Table 1 and table 2 given below give comparison of embodiment of the invention and ship blade. As also seen from the tables, in addition to a considerably high torque difference, when it is considered that surface areas of turbines used in seas at present are narrower, much less torque can be generated. Therefore, when turbine disclosed under the invention generates torque of 0,38 and 1 ,917 when compared to ship blade as shown in table below, it offers much more torque generation advantage when compared to turbines used for power generation from present sea currents.

In order to achieve above mentioned purposes, invention is an underwater power generation turbine with airfoil cross-section embodiment used for generating more power from currents such as sea, river, irrigation canals etc. characterized in comprising;

• Turbine blade of spiral structure and in multiple sequence one after another and o Forming turbine airfoil cross-sectional view (vertical or horizontal) when viewed from side due to multiple sequencing one after another, o Forming turbine blade cross-sectional view when viewed from front as a result of multiple sequencing one after another,

• A turbine nose cone where one end of turbine blade is connected, and also having shaft connection and located in front side of turbine where current enters,

• a turbine slip cone where other end of turbine blade is connected, and also having shaft connection and located in rear side of turbine where current enters. The structural and characteristics features of the invention and all advantages will be understood better in detailed descriptions with the figures given below and with reference to the figures, and therefore, the assessment should be made taking into account the said figures and detailed explanations.

Brief Description of the Drawings

Figure 1 is front view of turbine of the invention.

Figure 2 is rear view of turbine of the invention.

Figure 3 is side view of turbine of the invention.

Figure 4 is front isometric view of turbine of the invention.

Figure 5 is rear isometric view of turbine of the invention.

Figure 6 is view of vertical and horizontal projection airfoil cross-section of turbine of the invention.

Figure 7 is airfoil cross-sectional view of blade part of turbine of invention.

Figure 8 is attack blade cross-sectional and flow operation of turbine of invention.

Figure 9 is attack blade cross-sectional and flow operation of slip blade of turbine of invention.

Figure 10 is view of palin back surface formed on turbine blades.

Figure 11 is view of attack and slip sides blade cross-sections of turbine blades.

The drawings are not necessarily to be scaled and the details not necessary for understanding the present invention might have been neglected. In addition, the components which are equivalent to great extent at least or have equivalent functions at least have been assigned the same number.

Description of Part References

1 . Blade current surface

2. T urbine attack blade cross-section

3. Nose cone (attack)

4. Shaft

5. Turbine blades

5.1 Primary blade section

5.2 Secondary blade section

5.3 Third blade section 6 Turbine blade - nose cone connection

7. Turbine slip blade cross-section

8. Slip cone

9. Turbine blade - slip cone connection

10. Turbine vertical and horizontal airfoil cross-section

11. T urbine blade airfoil cross-section

12. T urbine blade motion direction

13. T urbine attack blade cross-section - attack edge

14. Current

15. Applied power

16. Fluid passing around blade

17. Palin back

Detailed Description of the Invention

In this detailed description, the preferred embodiments of the invention have been described in a manner not forming any restrictive effect and only for purpose of better understanding of the matter.

Invention relates to underwater power generation turbine with airfoil (blade profile) crosssection embodiment used for generating more power from currents such as sea, river, irrigation canals etc.

The embodiment disclosed under the invention comprises turbine vertical and horizontal airfoil cross-section (10) of adequate number as shown in figure 6 and spiral turbine blades (5) forming turbine blade airfoil cross-section (11) bas shown in figure 7. Turbine vertical and horizontal airfoil cross-section (10) and turbine blade airfoil cross-section (11 ) is the view formed as a result of sequencing of turbine blades (5). Turbine blades (5) can be formed in more or less number subject to size of current (14). When turbine is viewed from front, turbine blades (5) are in airfoil cross-section projection view. This manipulates flowing and causes blade to act as airfoil subject to rotation direction. This leaves less dragging mark and provides more efficient revolution. For that reason, for the current speeds when conventional turbines do not start revolution, this turbine of the invention can start to run.

One end of turbine blades (5) is connected to turbine nosecone (3) located on front side of turbine. Turbine nose cone (3) is connected to shaft (4). Turbine nose cone (3) is the end part in cone shape where current (14) enters turbine system. Shaft (4) is the spindle around which turbine blades (5) turn.

Other end of turbine blades (5) is connected to turbine slip cone (8) located on rear side of turbine. Turbine slip cone (8) is connected to shaft (4). Turbine slip cone (8) is the end part in cone shape on the rear where current (14) exits turbine system.

Turbine blade -nose cone connection (6) and turbine blade - slip cone connection (9) provides connection of turbine blade (5) to nose cone (3) and slip cone (8).

Current (14) enters into turbine system from nose cone (3) side, progresses along blade current surface (1) and leaves system from slip cone (8) side. (Blade current surface (1) is the surface where current (14) applies force.) Current (14) proceeds along blade current surface (1) and applies power (15) onto blade current surface (1). Thus, turbine blades (5) moves and rotates in direction of turbine blade motion direction (12). During motion of turbine blade (5), turbine blades (5) interact with fluid (16) passing around blade in motion direction. Fluid (16) passing around blade tends to turbulence but current (14) passing through blade current surface (1) delays turbulence of fluid (16) passing around blade. This means less dragging of turbine blades (5) in motion direction (12) and more efficient revolution. On the same ground, turbine blades (5) pressure difference between surface areas is much more minimal. This is a factor decreasing cavitation occurrence more.

Spiral embodiment of each turbine blade (5) of the invention is one single part and also comprises an embodiment of scanning area from small to big from front to back and then from big to small. As shown in figure 3, primary blade section (5.1) and third blade section (5.3) are smaller in comparison to secondary blade section (5.2). Thus, when viewed from side, as shown in figure 6, symmetric airfoil (as installed in aircraft blade systems) embodiment view can be provided. Each of turbine blades is same of each other. They follow one another. Horizontal or vertical projection views display airfoil cross-section. While blade cross-section gives a wider and more perpendicular current surface on nose cone (3) side, it gives a narrower and wide angle current surface on slip cone (8) side. This provides that current leaves with less dragging turbine.

Palin back (17) (embossing pattern) is formed on turbine blade (5) surface. With micro turbulence formed with palin back (17) fluid motion above fluid is provided and thus friction and so back dragging is reduced. Scales on sea living beings are the best example for it. Also, micro turbulences forming on intrusions on golf boll prevents approach of an upper layer flowing to surface. This provides a more linear flowing behind turbine and thus proper orbit drawn by blade.