Journal of Aircraft最新文献_第5页

Neural-Network-Based Model for Trailing-Edge Flap Loads in Preliminary Aircraft Design 飞机初步设计中基于神经网络的尾翼载荷模型

IF 2.2 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Aircraft

Pub Date : 2024-03-19 DOI: 10.2514/1.c037632

Ralph Stephan, Cedric Heyen, Eike Stumpf, Johannes Ruhland, Christian Breitsamter

Journal of Aircraft, Ahead of Print.

飞机杂志》，提前出版。

引用次数: 0

Application of Mass Particle Methods in the Shape Design for Scientific Balloons 质量微粒法在科学气球形状设计中的应用

IF 2.2 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Aircraft

Pub Date : 2024-03-12 DOI: 10.2514/1.c037587

Hangyue Zhang, Yanchu Yang, Rong Cai

This paper proposes a dynamic simulation method for solving balloon shapes. The mass-spring-damping model is used to discretize two-dimensional generatrixes and three-dimensional membrane surfaces, respectively. We solve two-dimensional/three-dimensional ascent shapes at different zero-pressure heights and numerically simulate mushroom cloud shapes that occur during the balloon ground launch. The typical rapid transition feature of the mushroom cloud shape at the waist is depicted. In addition, a preliminary numerical simulation study was conducted for the pumpkin superpressure balloon deployment instability problem. The Calladine instability critical curve for constant angle design lobes is compared and validated for different gore numbers and lobe angles. Further, simulations were carried out on fully inflated shapes of two derived superpressure balloon designs developed by the Japan Aerospace Exploration Agency/Institute of Space and Astronautical Science, namely, the Tawara intermediate cylindrical segment balloon and the diamond-shaped tendon balloon. We verify the ISAS conclusion that the diamond-shaped tendon balloon has a cylindrical shape when fully inflated. Finally, a preliminary simulation study was carried out on the deployment shape of four ballonet architectures in the superpressure balloon. The proposed method for solving various types of balloon shapes based on the mass particle method is simple and efficient, and it has been well applied in our actual balloon engineering.

本文提出了一种解决气球形状的动态模拟方法。质量-弹簧-阻尼模型分别用于离散二维生成矩阵和三维膜面。我们求解了不同零压高度下的二维/三维上升形状，并对气球地面发射过程中出现的蘑菇云形状进行了数值模拟。描述了腰部蘑菇云形状的典型快速过渡特征。此外，还对南瓜超压气球展开不稳定性问题进行了初步数值模拟研究。比较并验证了不同孔数和叶片角度下恒定角度设计叶片的卡拉丁不稳定性临界曲线。此外，还对日本宇宙航空研究开发机构/宇宙航空科学研究所开发的两种衍生超压气球设计（即俵中间圆柱段气球和菱形腱气球）的完全充气形状进行了模拟。我们验证了日本宇宙航空研究开发机构的结论，即菱形腱膜气球在完全充气后呈圆柱形。最后，我们对超压气球中四种球囊结构的展开形状进行了初步模拟研究。所提出的基于质点法求解各类气球形状的方法简单高效，在我国实际的气球工程中得到了很好的应用。

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引用次数: 0

Effects of Wave Parameters on Load Reduction Performance for Amphibious Aircraft with V-Hydrofoil 波浪参数对采用 V 型水翼的水陆两栖飞机减负性能的影响

IF 2.2 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Aircraft

Pub Date : 2024-03-08 DOI: 10.2514/1.c037660

Yujin Lu, Shuanghou Deng, Yuanhang Chen, Tianhang Xiao, Jichang Chen, Fan Liu, Sichen Song, Bin Wu

Journal of Aircraft, Ahead of Print.

飞机杂志》，提前出版。

引用次数: 0

Flowfield of an S-Shaped Inlet with High Boundary-Layer Ingestion Fraction 具有高边界层摄入量的 S 形入口流场

IF 2.2 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Aircraft