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Externally blown elevon applied for the longitudinal control of blended wing body transport with podded engines

机译：外吹式elevon用于荚果发动机对机翼混合机体运输的纵向控制

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摘要

Limited longitudinal control authority due to the absence of a horizontal tail and short lever arm is a critical challenge for blended-wing-body (BWB) aircrafts, especially during take-off and landing conditions. To address this issue, an extended external blown elevon is promoted as an alternative. The control capability of this new type of elevon is studied using computational fluid dynamics (CFD) methods. A parameter study is performed on the extended position. The control authority of the blown elevon is more efficient than that of the conventional plain elevon under different flight conditions because of the lengthened lever arm, flow-separation suppression and jet-blowing effects. The effects of a one-engine inoperative (OEI) condition on the control capability is also evaluated. The results indicate that the blown elevon can alleviate the directional moment caused by OEI. It is concluded that the external blown elevon can be a potential option for longitudinal control in practical BWB design. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：由于缺少水平尾翼和短杠杆臂，因此纵向控制权限有限，这对混合机翼身（BWB）飞机来说是一个严峻的挑战，尤其是在起飞和着陆条件下。为了解决此问题，建议使用扩展的外部吹扫式电子元件。使用计算流体动力学（CFD）方法研究了这种新型elevon的控制能力。对伸展位置执行参数研究。在不同的飞行条件下，由于操纵杆加长，气流分离抑制和喷射效果，吹制的电子元件的控制权限比传统的普通电子元件更有效。还评估了单引擎不工作（OEI）条件对控制能力的影响。结果表明，吹制的电子体可以减轻由OEI引起的定向力矩。结论是，在实际的BWB设计中，外部吹制的电子元件可能是纵向控制的潜在选择。 （C）2019 Elsevier Masson SAS。版权所有。

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