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THE LEA FLIGHT TEST PROGRAM

机译：最佳飞行测试计划

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During the last 10 years, a large research and technology effort has been led by MBDA and ONERA to develop knowledge on high-speed airbreathing propulsion and master associated technologies. Development of operational, civilian or military application of the hypersonic airbreathing propulsion depends on two key points: development of needed technologies for the fuel-cooled structure of the propulsion system and capability to predict, with a reasonable accuracy, and to optimise the aero-propulsive balance (or generalized thrust-minus-drag balance). The majority of the technology development effort can be led with available ground test facilities and classical numerical simulation (thermics, mechanics, etc.). On the contrary, before any operational application, it is mandatory to demonstrate our ability to predict the aero-propulsive balance (generalized thrust-minus-drag balance) of a hypersonic vehicle, providing sufficient margins to start a costly technological program. Considering this mandatory step, MBDA and ONERA are leading a specific scientific program, called LEA, which organized as follows: 1. define a methodology for the development of a hypersonic vehicle using ground tests and numerical simulation, 2. develop the tools (experimental and numerical) required for this purpose, 3. apply this methodology to the development of a simplified, scientific experimental vehicle, 4. validate this methodology through a series of flight tests. Started in January 2003, this program is planned to end in 2012 after 6 autonomous flight tests of the experimental vehicle in the Mach number range from 4 to 8. Beyond this first step, a preliminary flight test program, called EAST, can be proposed in Europe to prepare an extension of the LEA flight domain up to Mach 12 in the view of the possible application to future reusable space launchers.
机译：在过去的十年中，MBDA和ONERA牵头进行了大量的研究和技术工作，以开发有关高速呼吸推进的知识并掌握相关技术。高超音速呼吸推进的作战，民用或军事应用的开发取决于两个关键点：推进系统燃料冷却结构所需技术的开发以及以合理的精度进行预测并优化航空推进的能力平衡（或广义推力-减阻平衡）。大多数技术开发工作都可以由可用的地面测试设备和经典的数值模拟（热学，力学等）主导。相反，在任何操作应用之前，必须证明我们有能力预测高超音速飞行器的气动推进平衡（广义推力减去阻力平衡），为启动昂贵的技术计划提供足够的余地。考虑到这一必不可少的步骤，MBDA和ONERA领导着一项名为LEA的特定科学计划，其组织如下：1.使用地面测试和数值模拟来定义开发超音速飞行器的方法，2.开发工具（实验和数值）； 3。将这种方法学应用于简化的科学实验飞行器的开发； 4。通过一系列飞行测试验证这种方法学。该计划从2003年1月开始，计划在马赫数范围为4到8的实验车辆进行6次自动飞行测试之后，计划于2012年结束。除第一步之外，还可以提出一个称为EAST的初步飞行测试计划。欧洲可能会考虑将其应用于未来可重复使用的太空发射器，从而准备将LEA飞行域扩展到12马赫。

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