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Enabling Advanced Wind-Tunnel Research Methods Using the NASA Langley 12-Foot Low Speed Tunnel

机译:使用NASA Langley 12英尺低速隧道启用先进的风洞研究方法

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Design of Experiment (DOE) testing methods were used to gather wind tunnel data characterizing the aerodynamic and propulsion forces and moments acting on a complex vehicle configuration with 10 motor-driven propellers, 9 control surfaces, a tilt wing, and a tilt tail. This paper describes the potential benefits and practical implications of using DOE methods for wind tunnel testing - with an emphasis on describing how it can affect model hardware, facility hardware, and software for control and data acquisition. With up to 23 independent variables (21 model & 2 tunnel) for some vehicle configurations, this recent test also provides an excellent example of using DOE methods to assess critical coupling effects in a reasonable timeframe for complex vehicle configurations. Results for an exploratory test using conventional angle of attack sweeps to assess aerodynamic hysteresis is summarized, and DOE results are presented for an exploratory test used to set the data sampling time for the overall test. DOE results are also shown for one production test characterizing normal force in the Cruise mode for the vehicle.
机译:实验设计(DOE)测试方法用于收集风洞数据,这些数据表征了气动和推进力以及作用在复杂车辆配置上的力矩,该复杂车辆配置有10个电动推进器,9个控制面,一个倾斜翼和一个倾斜尾翼。本文介绍了使用DOE方法进行风洞测试的潜在好处和实际意义-重点介绍了它如何影响模型硬件,设施硬件以及用于控制和数据采集的软件。对于某些车辆配置,最多可使用23个自变量(21个模型和2个隧道),该最新测试还提供了一个出色的示例,可以使用DOE方法在合理的时间范围内评估复杂车辆配置的关键耦合效应。总结了使用常规迎角扫角评估空气动力滞后的探索性测试结果,并给出了探索性测试的DOE结果,用于设置总体测试的数据采样时间。还显示了一项生产测试的DOE结果,该测试表征了车辆在巡航模式下的法向力。

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