What does solidity ratio mean?

Blade solidity is an important design parameter for the axial flow impeller and is defined as the ratio of blade chord length to spacing.

How do you calculate wind load on a building?

Armed with pressure and drag data, you can find the wind load using the following formula: force = area x pressure x Cd. Using the example of a flat section of a structure, the area – or length x width – can be set to 1 square foot, resulting in a wind load of 1 x 25.6 x 2 = 51.2 psf for a 100-mph wind.

What category is 875 terrain?

IS-875 is the standard in India for design loads (other than earthquake) for buildings and structures. Basic wind speed as applicable to 10 m height above mean ground level for different zones in the country can be directly calculated if the proper value is defined in the Wind Zone Number box.

What is solidity in VAWT?

Geometry Definition. Once 𝜆 has been chosen, the geometry of the VAWT can be defined through a dimensionless parameter known as the solidity 𝜎 = 𝑁 𝑐 𝑑 , ( 2 ) which is a function of the number of blades 𝑁 , the chord length of the blades 𝑐 , and the diameter of the rotor 𝑑 .

What is basic wind speed?

The wind speed that is used in determining wind load on a structure before other factors (such as height above the ground and the effects of shielding) are taken into account.

Is snow load a code?

The building which are located in the regions where snowfall is very common, are to be designed for snow loads. The code IS 875 (Part-4):1987 deals with snow loads on roofs of the building.

What is frame spacing ratio?

as per is 875 part 3 , frame spacing ratio is c/c distance b/w frames divided by least overall dimension of frames / beams/girders perpendicular to the direction of wind. The beam/floor levels are spaced 3m .

What is aerodynamic solidity?

Solidity is the ratio of total rotor planform. area to total swept area. Low solidity (0.10) = high speed, low torque. High solidity (>0.80) = low speed, high torque.