Wake and Loss Analysis for a Double Bladed Swept Propeller
Paper in proceeding, 2016

Inspired by Prandtl’s theory on aircraft wings with minimum induced drag, the authors introduced a double-bladed propeller, the Boxprop, intended for high-speed flight. The basic idea is to join the propeller blades pair-wise at the tip to improve aerodynamics and mechanical properties compared to the conventional propeller. The rather complex geometry of the double blades gives rise to new questions, particularly regarding the aerodynamics. This paper presents a propeller wake energy analysis method which gives a better understanding of the potential performance benefits of the Boxprop and a means to improve its design. CFD analysis of a five bladed Boxprop demonstrated its ability to generate typical levels of cruise thrust at a flight speed of Mach 0.75. The present work shows that the near tip velocity variations in the wake are weaker for this propeller than a conventional one, which is an indication that a counter rotating propeller designed with a Boxprop employed at the front may exhibit lower interaction noise.


Tip vortex



Open Rotor


Alexandre Capitao Patrao

Chalmers, Applied Mechanics, Fluid Dynamics

Rickard Avellan

GKN Aerospace Services

Anders Lundbladh

GKN Aerospace Services

Tomas Grönstedt

Chalmers, Applied Mechanics, Fluid Dynamics

Proceedings of ASME Turbo Expo 2016: Turbine Technical Conference and Exposition, Seoul, South Korea, Jun 13-17, 2016

Vol. 1

Innovativ Framdrivning och Motorinstallation

VINNOVA (2013-01189), 2013-07-01 -- 2017-06-30.

Driving Forces

Sustainable development

Areas of Advance


Subject Categories

Aerospace Engineering

Vehicle Engineering

Fluid Mechanics and Acoustics


C3SE (Chalmers Centre for Computational Science and Engineering)



More information

Latest update