In this combined experimental and numerical study, the propeller–airframe aerodynamic interaction is characterized for an aircraft configuration with propellers mounted to horizontal tailplane. The contributions of propeller airframe overall loading are distinguished in analyses by using a combination external balance internal load cell data. Validated computational fluid dynamics simulations t...

This paper presents validation and assessment of ducted propellers for aircraft propulsion. Numerical methods simulation strategies are put forward, including steady/unsteady high-fidelity computational fluid dynamics (CFD) simulations simpler momentum-based methods. The comparisons the made using a propeller proposed by NASA. Simulations also performed analyzed at extended advance ratios, blad...

This paper focuses on the dynamic effects of flexible propellers F2 class aircraft models. An oscillating propeller affects an engine’s mechanical performance, and this combination has a huge influence model’s flight performance. In first second sections paper, two physical tests that were performed according to test results obtained using CFX numerical model are discussed. The studies for mode...

Abstract We review the development of contra-rotating propellers from origins to present. Initially, these systems were proposed increase speed, then propulsive efficiency, and thus reduce fuel burn. Ultimately, they hit another environmental limit: too much noise. Acoustics has been in fact main focus past 30 years. Pioneering work done across countries demonstrated several unique features thi...

Abstract The scope of the present paper is to assess potential distributed propulsion for a regional aircraft regarding aero-propulsive efficiency. Several sensitivities such as effect wingtip propellers, thrust distribution, and shape modifications are investigated based on configuration with 12 propulsors. Furthermore, an initial assessment high-lift performance undertaken in order estimate w...

Side-by-side propellers characterise the architecture of most new electric aircraft (eVTOLs) designed in recent years for urban air mobility. The aerodynamic interaction between side-by-side represents one key phenomena that flow field and performance these novel configurations. present article describes main results a wind tunnel campaign aimed to investigate features this interaction, with pa...

With the advancement in electric propulsion systems, aircraft designers and manufacturers are no longer constrained to established configurations. Developments Vertical Take-off Landing (VTOL) have been seen recent times through design of modern tiltrotor aircraft, tiltwing concepts multi-rotor designs. The combination these developments allowed engineers propose designs which utilise vertical ...

In recent times, mini and micro aerial vehicles have shown significant potential as miniature unmanned aircraft for surveillance and reconnaissance purposes. Selection of correct combination of engine and propeller is very crucial step in the design of this class of vehicles. The objective of present study is to establish measurement system and obtain performance maps for available mini/micro v...

1EPA 2Printed on paper that contains at least 30 percent postconsumer fiber. 1 This fact sheet focuses on contrails produced by aircraft engine exhaust. However, the term " contrail " is also used to refer to the short trails sometimes briefly appearing over aircraft wings or engine propellers, especially under mild, humid conditions. These contrails consist entirely of atmospheric water that c...