Large-scale advanced propeller blade pressure distributions - Prediction and data

Nallasamy, N.; Yamamoto, Osamu; Warsi, Saif; Bober, L. J.

doi:10.2514/3.23347

Cited by 10 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…III.B.1. This vortex and its pressure gradient are captured better with grid refinement [24], resulting in small changes in thrust and torque coefficient of the propeller blade. To assess the effect of grid refinement on the flowfield in the propeller slipstream, the time-averaged radial distribution of tangential velocity in a plane at X∕R 1.5 is shown in Fig.…”

Section: Grid-convergence Study and Error Estimationmentioning

confidence: 99%

Aerodynamic and Aeroacoustic Performance of a Propeller Propulsion System with Swirl-Recovery Vanes

Sinnige

Stokkermans

Ragni

et al. 2018

Journal of Propulsion and Power

View full text Add to dashboard Cite

Swirl-recovery vanes (SRVs) enhance propulsive efficiency by converting the rotational kinetic energy in a propeller slipstream into additional thrust. This paper discusses the aerodynamic and aeroacoustic impact of the installation of a set of SRVs downstream of a single-rotating propeller. Experiments were carried out in a large low-speed wind tunnel, whereas simulations were performed by solving the Reynolds-averaged Navier-Stokes equations. Favorable comparisons between the experimental and numerical slipstream data validated the simulations, which predicted a maximum propulsive-efficiency increase of 0.7% with the current design of the SRVs. This can be improved further by optimizing the pitch distribution of the SRVs. The upstream effect of the SRVs on the time-averaged propeller performance was negligible. Yet, small but systematic unsteady propeller loads were measured with a peak-to-peak amplitude of at most 2% of the time-averaged loading, occurring at a frequency corresponding to the five SRV passages during one revolution. The downstream interaction was one order of magnitude stronger, with unsteady loading on the SRVs with a peak-to-peak amplitude of about 20% of the time-averaged load. The interaction mechanisms caused an increase of the tonal noise levels of 3-7 dB, with the noise penalty decreasing with increasing propeller thrust setting.

show abstract

Section: Grid-convergence Study and Error Estimationmentioning

confidence: 99%