Leading Edge Thicker portion of the airfoil that is the first part of the blade to meet the air. Net Free Area Net area at the plane of the fan through which all air must pass. Usually based on the nominal fan diameter minus seal disc area or hub diameter. Note that blade area is ...
axial force calculated by the one-dimensional beam theory formula, verifying the accuracy of the numerical model. They also used the method of drilling relief holes on the turbine hub to reduce the axial force of the pump impeller and turbine. Gu [25] focused on the study of adjustable ...
Inspired by this, bionic design of two-stage fan blades was carried out by applying only a certain range of wing angle structure on the blade without changing the parameters of the prototype blade, such as airfoil, twist angle α and blade height H, as shown in Figure 5. The wing angle...
where 𝛽∗𝜌𝑘𝜔β*ρkω is the dissipative term of the k equation; 𝑃𝑘Pk is the turbulent synthesis term generated by the viscous force; and F1, F2 are the SST k–ω mixed functions, which are 1 near the wall and 0 at the shear layer. 2.4. Boundary Conditions The comm...
The force of gravity has a negligible effect on the grain path and, therefore, is not taken into account in its motion. In turn, value of the FB and FR forces will depend on the diameter, shape and density of dust grain and the type of gas. The rotating aerosol causes the formation ...
This is the reason why the resultant torque oscillations on a rotor blade are weaker. It is noted that, for either the rotor or the stator, the oscillations in the total force of all the blades are much weaker than that of one blade (see Figure 10), and they only occur at the ...
The circular arc method takes a circular arc as the pressure surface of the airfoil and thickens from it to the suction surface based on a certain law. The calculation of this method is simple, which makes it the most widely used method in the design of the axial flow pump. The schematic...