EAGER: Experimental Verification of a Transformative Calibration Method

EAGER：变革性校准方法的实验验证

• 批准号: 1137625
• 负责人: Jay Frankel
• 金额: $ 4.85万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1137625&HistoricalAwards=false
• 关键词: EAGER; Experimental; Verification; Transformative; Calibration

1137625FrankelA novel calibration method is under development that produces accurate surface heat flux predictions in highly hostile thermal environments without requiring surface instrumentation. This concept has substantive merit for investigating: a) the effectiveness of thermal protection systems associated hypersonic flight vehicles or for understanding thermal efficiencies in hypersonic combustors; b) heat transfer on unreachable surface structures such as found in combustion liners, small chambers, and containment walls as a result of a hostile thermal event; and, c) heat transfer on structures emanating from pool fires or explosions. A comprehensive method is proposed that integrates physical, experimental, mathematical and computational principles. The resulting formulation implicitly possesses full-sensor characterization, probe positioning, host material thermophysical properties, diffusion physics, and mathematical constants required for stable and accurate surface heat flux predictions. A second novel feature of the approach lies in the acquisition of the stabilizing parameters though multiple calibration experiments. The proposed methodology is applicable to one-, two-, and three-dimensional geometries involving either isotropic or orthotropic materials in one or multi-region configurations.Laboratory calibration will be performed using a fiber-optic, diode laser system. The new calibration method leads to a Volterra integral equation of the first kind; and, thus the coupon or specimen can be interpreted as a transducer ready for practical implementation. Intellectual Merit: The multipronged strategy weaves analysis, computations, sensor development, instrumentation and experimental methods throughout the complete solution process and addresses critical US applications in a responsive, aggressive and timely manner. New material development is expected to continue at an impressive rate. Responsive state-of-the-art accurate methods for estimating surface heat flux and temperature that includes sensor characterization still requires resolution for many application involving highly hostile environments. It should be noted that the novel calibration view to inverse heat conduction could impact other areas involving inverse estimation.Broader Impact: Success of the proposed research will impact aerospace, energy, fire, combustion, geophysical, defense and national security research and developments The multifaceted nature of the study enhances the research experience of our undergraduate and graduate students by providing an integrated view to problem solving. The research findings will be incorporated into undergraduate and graduate courses. Short course development will be pursued for presentation at universities; conferences; and, national laboratories. We propose an aggressive outreach plan for motivating HS students to strongly consider engineering as a career through a first-hand, and highly exciting laboratory experience.

1137625 Frankel一种新的校准方法正在开发中，该方法可以在高度恶劣的热环境中产生准确的地表热通量预测，而不需要地面仪器。这一概念对于研究：a)与高超声速飞行器相关的热保护系统的有效性或用于了解高超声速燃烧室的热效率；b)由于不利的热事件而在无法到达的表面结构上的热传递，例如在燃烧衬里、小燃烧室和安全壳中；以及c)池火或爆炸引起的结构上的热传递。提出了一种综合了物理原理、实验原理、数学原理和计算原理的计算方法。由此产生的公式隐含地拥有完整的传感器表征、探头定位、宿主材料的热物理性质、扩散物理以及稳定和准确的表面热流预测所需的数学常数。该方法的第二个新颖之处在于通过多次标定实验获取稳定参数。建议的方法适用于一维、二维和三维几何结构，包括一个或多个区域的各向同性或正交各向异性材料。实验室将使用光纤半导体激光系统进行校准。新的校准方法得到了第一类Volterra积分方程，因此，试件或试件可以解释为准备实际实施的换能器。智能优势：多管齐下的战略将分析、计算、传感器开发、仪器和实验方法贯穿整个解决方案过程，并以响应迅速、积极和及时的方式满足美国的关键应用。预计新材料的开发将以令人印象深刻的速度继续下去。响应最先进的准确估计表面热流和温度的方法，包括传感器特性，对于涉及高度恶劣环境的许多应用来说，仍然需要分辨率。应该指出的是，逆热传导的新校准观点可能会影响到其他涉及逆估计的领域。更广泛的影响：拟议研究的成功将影响航空航天、能源、火灾、燃烧、地球物理、国防和国家安全的研究和发展。这项研究的多面性通过提供解决问题的综合观点来增强我们本科生和研究生的研究经验。研究成果将被纳入本科生和研究生课程。将继续开发短期课程，在大学、会议和国家实验室进行介绍。我们提出了一个积极的外展计划，鼓励HS的学生通过亲身的、非常令人兴奋的实验室体验，强烈地将工程作为一种职业。