On the aeroacoustic and flow structures developed on a flat plate …
2015年10月13日 · This paper focuses specifically on the sawtooth shape. A comprehensive experimental study by Gruber et al. [9] on many sawtooth geometries has established that …
Shape considerations for the design of propellers with trailing …
Square wave serration outperforms the conventional sawtooth for small propellers. Mixed sawtooth and sinusoidal serrations can tailor far-field noise for larger rotors. Serration shape …
Four types of serration geometries used in this study: (a) sawtooth ...
The sawtooth geometry consists of straight edges connecting the roots and tips. The iron shaped geometry consists of circular arcs that are tangent to the chord at the serration roots.
sawtooth shape and its position on the compressor's rotational speed characteristics were examined. Chen et al. (2017, 2018) demonstrated that sawtooth structures outperform their …
A parametric study of serration design for trailing–edge …
2023年8月1日 · Geometric shape modifications are represented by concave–shaped and combed–sawtooth serrations. This study represents a unique sensitivity–based parametric …
Aeroacoustic Design Optimization and Experimental Investigation …
2022年6月21日 · The ability of sawtooth trailing-edge serrations to reduce TBL-TE noise is analyzed through a single-objective numerical optimization study and trailing-edges tested in a …
Effects of trailing-edge serration shape on airfoil noise reduction ...
2022年10月6日 · When controlling the trailing-edge (TE) interference noise of airfoil, the design of the TE serration shape is still an open issue. To this end, the flow and noise generation for …
Noise reduction mechanisms of sawtooth and combed-sawtooth …
This manuscript studies the physical mechanisms behind the noise reduction by investigating the far-field noise and the hydrodynamic flow field. A conventional sawtooth and a combed …
Four diferent cases of sawtooth serration geometries are tested for NACA-0012 airfoil and flat-plate trailing edges. Results from the optimization study are used to examine and validate the …
Experimental Study of the Performance of a Propeller with …
2021年3月10日 · The 3/4-DL propeller which has the sawtooth shape of TE serrations with an adequate serration DL exhibited best comprehensive performance, by an average of 3.0 dB …