**Essential Improvements for VAWTs structure**

- Vertical two axis wind turbine gives structure stability and balance. Both axis rotate on opposite directions.
- Front concentrator increases wind speed.

- Front concentrator split wind flow to side blades and back deflector to make useful work and protects returning blades from wind impact, that means, it make also useful work.

- Back deflector directs wind flow to the inner blades of both axis to make a useful work and reaching the same pressure and force like on the outside blades.
- As the result of reaching same pressure, force and wind speed on the opposite blades of single axis we discover formed of whirlwind.

**Wind Ratings**

- Survival Wind Speed - 55 m/s (123 mph)

- Rated Wind Speed - 11,2 m/s (25 mph)

- Cut-in Wind Speed - 1 m/s (2,5 mph)

- Cut-out Wind Speed - 35 m/s (78 mph)

**Power**

- Small size wind turbine (less then 100kW)

- Utility-scale wind turbine (100kW to few MW)

- Large Turbines (few MW to 120MW)

• the cut-in windspeed: when the machine begins to produce power

• the design windspeed: when the windmill reaches its maximum efficiency

• the rated windspeed: when the machine reaches its maximum output power

• the furling windspeed: when the machine furls to prevent damage at high windspeeds.

• the design windspeed: when the windmill reaches its maximum efficiency

• the rated windspeed: when the machine reaches its maximum output power

• the furling windspeed: when the machine furls to prevent damage at high windspeeds.

**Approved theoretical calculation to potentially manufacture single wind turbine of 120 MW power, more or less.**

**Aerodynamic calculation of our NEW Wind Turbine made by Professor**

*V. Sannikov*the following assumptions:1. Wind Turbine blades are shaped like rectangular infinitely thin plates.

2. Air flow around blades is incompressible and two – dimensional potential flow.

3. Stalling phenomena are not taken into account.

The calculation method allows to study the effect of automatically changing the blade shape (depending on the azimuthal position) on the efficiency of the Wind Turbine.

Direction of scientific and academic activity of

Direction of scientific and academic activity of

*V. Sannikov*.**Scientific title:**Habilitated Doctor of Engineering

**Academic title:**Professor

**Direction of scientific activity:**

1. Development of mathematical models and programs flight dynamics highly maneuverable aircraft including aviation simulators.

2. Development of mathematical models and programs for unsteady aerodynamic characteristics of aircraft and theirs parts.

3. Development of mathematical models and calculation programs flutter of wings in subsonic, transonic and supersonic speeds.

4. Development of mathematical models and computer programs for calculation of aerodynamic performance of wind turbines

Academic specialization:

Academic specialization:

• Aerodynamics

• Dynamics of Flight

• Hydraulics

• Mathematics

• Application of MATLAB for engineering calculations.

**Career and the position:**

• Head of Department “Hydraulics, Aerodynamics and Dynamics of Flight” Riga Aviation University, 1 Lomonosov str., LV-1019, Riga, Latvia.

• Head of Professors Group “Vehicle Theory, Calculation and Design “ Riga Technical University, Aviation Institutes, 1 Lomonosov str., LV-1019, Riga,

• Professor of Engineering and Management Facility, Riga Aeronautic Institute, Mezkalna str. 9, Riga, Latvia.

**Other activities**(participation in scientific and other associations)

• Member of The Latvian

*Association*of University

*Professors*

• Head of the Scientific and Technical Council of the company AERKOM (Riga, Latvia)