Aerodynamic assessment of the cycloidal rotor fan

An Attempt to Evaluate the Cycloidal Rotor Fan Performance

“…shows the velocity distributions for the CRF with NACA 0012 and CLARK Y profiles for 4000 RPM. One can observe a significant flow separation around the NACA 0012 profiles, what was already observed in previous works[7] [8]. Whereas, the velocity distribution for CRF with CLARK Y profile does not repeat such behaviour, no significant separations around blades are observed.…”

“…The implementation of the cycloidal rotor for fans was numerically and experimentally investigated by authors in former works [7] [8]. The effectiveness of the elaborated CFD model was positively verified by experimental research using LDA measurements [8]. From the point of view of a positive displacement machine of the rotary type, the most effective design is the CRF with four blades.…”

“…Scheme of the cycloidal rotor fan with four blades of the NACA0012 profiles[8].The CFD simulations of the flow in the cycloidal rotor fan (CRF) with blades of NACA 0012 and CLARK Y profiles were made and herein presented. Numerical calculations of unsteady flow field in CRF were performed by means of Ansys CFX software.…”

Aerodynamics of airfoil moving along a circular trajectory

“…Unlike fixed aircraft wings, the blades of vertical-axial wind and hydroelectric power plants, as well as cycloidal propellers of ships and aircraft, move along circular trajectories. As the studies of research groups show [1][2][3], the aerodynamics of fixed blades and blades running along a circle has some differences. This is due to the occurrence of flow circulation inside the rotor, as well as due to the blade hitting the track formed by the forward-moving blades, and the location of the upper and lower surfaces of the airfoil at a different radius from the axis of rotation, which leads to the fact that the linear velocity of their movement is different.…”