New capabilities in CREATE™-AV Helios Version 11
New capabilities in CREATE™-AV Helios Version 11
复制标题
CREATE™-AV Helios 版本 11 中的新功能
DOI：
10.21079/11681/40883
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
N. Peters
中科院分区：
文献类型：
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作者：
A. Wissink;Jude Dylan;B. Jayaraman;B. Roget;V. Lakshminarayan;J. Sitaraman;A. Bauer;J. Forsythe;Robert Trigg;N. Peters
Create™-AV Helios是由美国国防部开发的高保真耦合计算流体力学/可持续发展基础设施。旋翼飞行器的气动力学预测。本文讨论添加到Helios版本11.0中的新功能。增加了一种新的快速运行的降阶空气动力学选项，称为漫游，以实现更快的周转分析。Roam是基于笛卡尔的，对旋翼采用执行机构线模型，对机身采用浸没边界模型。不需要生成近体网格，通过更大的时间步长和降低每步的成本相结合，模拟速度显著加快。JVX倾转旋翼机配置的漫游计算提供了与使用Helios的传统贴身计算相比更准确的下载预测，计算成本降低了50倍。漫游中的非定常尾迹没有得到很好的解决，但对于许多设计考虑，尾迹相互作用可能是一个不那么关键的问题。讨论的第二个功能是将六自由度功能添加到商店分离模型中。具有新的6自由度能力的通用机翼/门店/塔架外壳的Helios计算被发现与Create™-AV Kestrel的计算完全匹配，该代码在过去十年中已被广泛验证用于门店分离计算。
CREATE™-AV Helios is a high-fidelity coupled CFD/CSD infrastructure developed by the U.S. Dept. of Defense for aeromechanics predictions of rotorcraft. This paper discusses new capabilities added to Helios version 11.0. A new fast-running reduced order aerodynamics option called ROAM has been added to enable faster-turnaround analysis. ROAM is Cartesian-based, employing an actuator line model for the rotor and an immersed boundary model for the fuselage. No near-body grid generation is required and simulations are significantly faster through a combination of larger timesteps and reduced cost per step. ROAM calculations of the JVX tiltrotor configuration give a comparably accurate download prediction to traditional body-fitted calculations with Helios, at 50X less computational cost. The unsteady wake in ROAM is not as well resolved, but wake interactions may be a less critical issue for many design considerations. The second capability discussed is the addition of six-degree-of-freedom capability to model store separation. Helios calculations of a generic wing/store/pylon case with the new 6-DOF capability are found to match identically to calculations with CREATE™-AV Kestrel, a code which has been extensively validated for store separation calculations over the past decade.