Abstract
This numerical study reports the aerodynamic properties of a hybrid airship. The hybrid airships were designed by combining two semi-ellipsoids with a semi-discoid as the base model. From the base model, three different geometrics were identified to study their aerodynamic characteristics. A circular slot was provided between the pressure side and the suction side of the airship. The objective of this study was to realize the flow behavior, aerodynamic characteristics, and stability properties of such slotted hybrid flying vehicles. Interestingly, the results imply that the lift coefficient increases with an increase in the angle of attack for the slotted configurations; this is because the flow separation is delayed due to the slot opening, which in turn is due to the flow of energies from the high-pressure region to the bottom through the slots. The delayed stall angle was 50 degrees, which was 10% more than that of the base model. Aerodynamic characteristics are discussed based on surface pressure, coefficient of lift, and coefficient of drag for various slotted hybrid airships.
Highlights
Airship technology is progressing and has versatile applications such as endurance, survivability, cargo, weather monitoring, early warning systems, communication relays, meteorological surveillance, space exploration
We propose hybrid airships with various circular slot thicknesses, which improve the aerodynamic characteristics by balancing pressure force
The introduction of the slot openings made the stall angle increase by 10%, from by α =10%, from
Summary
Airship technology is progressing and has versatile applications such as endurance, survivability, cargo, weather monitoring, early warning systems, communication relays, meteorological surveillance, space exploration. Wi-Fi transmission, border surveillance, forest animal surveillance, etc. Airship aerodynamic analyses are of primary interest to researchers [1]. Aerodynamic behavior near space and their applications are most important for researchers. The aerostatic lift has no lift dependent on components, since helium gas is used to generate lift from buoyant force in such lighter-than-air (LTA) vehicles. There are propulsion systems to overcome drag and control devices to provide multi-axis stability
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