Paramotor Project Description

The present simulation is about a paramotor in a paraglider via ANSYS Fluent. A paramotor is the propulsion part of a paraglider that attaches to the pilot's seat. These engines are powered by gasoline and have fan blades attached to them. This simulation defines a cylindrical computational domain for airflow with a temperature of 26.85 C. For inlet and outlet boundaries of this domain, a pressure boundary condition is defined to determine the direction of air movement according to the amount of pressure. In the middle part of this model, a surface is defined as a fan, and the fan boundary condition with 383.8-pascal pressure jump is used. The aluminum casing of the engine with its thermocouple is defined behind the fan; It is assumed that the inner wall inside the engine has a constant temperature equal to 157 C. It is assumed that this temperature is defined based on the heat generated by the combustion inside the engine.

Geometry & Mesh

The present model is designed in the 3D model via Design Modeler. This model includes a domain designed with a fan in the middle. The following figure shows the geometry of the model.

The mesh of the present model has been done via ANSYS Meshing. Mesh is done unstructured, and the number of cells equals 1550207. The following figure shows the mesh of the model.

Paramotor Set-Up & Solution

Assumptions used in this simulation  :

• Pressure-based solver is used.
• The present simulation is steady.
• The effect of gravity is ignored.

Paramotor Results

After the solution, 2D and 3D temperature, velocity, and pressure contours are obtained. The contours show that airflow passes through the fan, air velocities increase, and significant pressure differences appear. Around the engine, local temperature increases due to the temperature of the inner wall inside the engine appearing. The results are shown in Figures 3 to 9.