Generation mechanism and suppression of lateral force on engine nacelle

Wen Qing; Cheng Zhihang; Wei Meng; Yang Kangzhi

doi:10.7638/kqdlxxb-2024.0046

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Generation mechanism and suppression of lateral force on engine nacelle

更新时间：2026-05-28

- Generation mechanism and suppression of lateral force on engine nacelle
- Vol. 44, Issue 1, Pages: 109-117(2026)
- 作者机构：
  
  中航通飞华南飞机工业有限公司,珠海,519040
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2024.0046
  CLC： V211.4
- Published：2026
- 稿件说明：
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温庆, 程志航, 魏猛, 等. 涡桨发动机短舱侧向力产生机理及其抑制[J]. 空气动力学学报, 2026, 44(1): 109−117.

Wen Qing, Cheng Zhihang, Wei Meng, et al. Generation mechanism and suppression of lateral force on engine nacelle[J]. 2026, 44(1): 109-117.
温庆, 程志航, 魏猛, 等. 涡桨发动机短舱侧向力产生机理及其抑制[J]. 空气动力学学报, 2026, 44(1): 109−117. DOI： 10.7638/kqdlxxb-2024.0046

Wen Qing, Cheng Zhihang, Wei Meng, et al. Generation mechanism and suppression of lateral force on engine nacelle[J]. 2026, 44(1): 109-117. DOI： 10.7638/kqdlxxb-2024.0046.

摘要

低速起飞时，强烈的螺旋桨滑流会在多发螺旋桨飞机的发动机短舱上引发显著侧向力，威胁飞行安全，因此有效抑制该侧向力至关重要。通过数值模拟，研究了高升力、大拉力状态下发动机短舱侧向力的产生原因以及短舱隔板对短舱侧向力的抑制机理，获得了短舱隔板安装位置、高度等参数对侧向力的影响规律。研究结果表明，短舱上安装的隔板能有效抑制螺旋桨的诱导环流，提高螺旋桨上行一侧的短舱压强，从而显著降低短舱产生的侧向力。在周向安装位置为50°时，隔板的侧向力抑制效果最佳。在迎角4°时，侧向力系数减小了79%；在迎角8°时，减小了63%。隔板前缘后移或后缘前移会减弱侧向力抑制效果，其中，相较于后缘前移，前缘后移状态的影响较小，前缘后移0.4 m时，在迎角4°时侧向力系数与无隔板状态相比仍能降低75%；隔板高度对于侧向力的抑制效果具有显著影响。

Abstract

Significant lateral forces induced by strong propeller slipstreams during low-speed takeoff pose a safety threat to multi-engine propeller aircraft. Effective suppression of these forces is crucial. This study investigates the generation mechanism of lateral forces on the engine nacelle under high-lift and high-thrust conditions

as well as the suppression mechanism of a nacelle strake

using numerical simulations. The effects of key parameters

including the strake’s circumferential position and height

on lateral force reduction are analyzed. Results indicate that the strake effectively suppresses the propeller-induced circulation and increases the pressure on the upstream side of the nacelle

thereby significantly reducing the lateral force. The optimal suppression effect is achieved at a circumferential installation position of 50°. At this position

the lateral force coefficient is reduced by 79% at a 4° angle of attack and by 63% at an 8° angle of attack. Shortening the strake—either by retracting the leading edge or advancing the trailing edge—diminishes its effectiveness. However

retracting the leading edge has a relatively minor impact: when the leading edge is retracted by 0.4 m

the lateral force coefficient can still be reduced by 75% compared to the configuration without a strake. In addition

the height of the strake is found to have a notable influence on lateral force suppression.

关键词

Keywords

references

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