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首页> 外文期刊>Aerospace and Electronic Systems, IEEE Transactions on >Free-Flight Models in Wind Tunnels
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Free-Flight Models in Wind Tunnels

机译：风洞中的自由飞行模型

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A radio telemetry system is described which permits the acquisition of aerodynamic data from free-flight models in wind tunnels. Small transistorized telemeters are used. The telemeters are frequency modulated by either variable-capacitance pressure transducers or by variable-resistance heat-transfer transducers. The models are generally recovered intact after tunnel runs, allowing repeated runs using a single model and permitting recalibrations to verify that no calibration changes have occurred. As many as four channels of data have been recorded simultaneously from a single model at Mach 20. These were base pressure and heat-transfer rate, and forebody surface pressure and heat-transfer rate on 9-deg half-angle, blunt cone models. Several single-channel, base-pressure measurements have been made on 10-deg half-angle, sharp cone models at Mach numbers of 4, 8, and 10. Sample aerodynamic data transmitted during these tests are presented to illustrate the performance of these telemetry systems.
机译：描述了一种无线电遥测系统，其允许从风洞中的自由飞行模型获取空气动力学数据。使用小型晶体管遥测仪。遥测仪通过可变电容压力传感器或可变电阻传热传感器进行频率调制。隧道运行后，通常会完整恢复模型，从而允许使用单个模型重复运行，并允许重新校准以验证没有发生校准更改。在20马赫的单个模型中，同时记录了多达四个数据通道，分别是基本压力和传热速率，以及在9度半角钝锥模型上的前体表面压力和传热速率。已经在马赫数分别为4、8和10的10度半角尖锐圆锥模型上进行了几个单通道基本压力测量。这些测试期间传输的示例空气动力学数据用于说明这些遥测的性能。系统。

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