Urso Justin J, Kinney Cory, Terracciano Anthony C, Barak Samuel, Laich Andrew, Albright Marley A, Pierro Michael, McGaunn Jonathan, Vasu Subith S
Center for Advanced Turbomachinery and Energy Research (CATER), University of Central Florida, 4000 Central Florida Blvd., 40-307, Orlando, Florida 32816-2450, USA.
Rev Sci Instrum. 2022 Jun 1;93(6):063905. doi: 10.1063/5.0084047.
A new shock tube facility has been designed, constructed, and characterized at the University of Central Florida. This facility is capable of withstanding pressures of up to 1000 atm, allowing for combustion diagnostics of extreme conditions, such as in rocket combustion chambers or in novel power conversion cycles. For studies with toxic gas impurities, the high initial pressures required the development of a gas delivery system to ensure the longevity of the facility and the safety of the personnel. Data acquisition and experimental propagation were implemented with remote access to ensure safety, paired with a LabVIEW- and Python-based user interface. Thus far, test pressures of 270 atm, blast pressures of 730 atm, and temperatures approaching 10 000 K have been achieved. The extreme limitations of this facility allow for emission spectroscopy to be performed during the oxidation of fuel mixtures, e.g., alkanes diluted in argon and carbon dioxide. Ignition delay times were determined and compared to simulations using chemical kinetic mechanisms. The design, experimental procedures, processes of analysis, and uncertainty determination are outlined, and typical pressure profiles are compared with a new gas dynamics solver and empirical correlations developed across multiple shock tube facilities. Preliminary reactive mixture analyses are included with further investigation of the mixtures outlined.
中佛罗里达大学设计、建造并表征了一种新型激波管设施。该设施能够承受高达1000个大气压的压力，可用于极端条件下的燃烧诊断，如火箭燃烧室或新型动力转换循环中的燃烧诊断。对于含有有毒气体杂质的研究，由于初始压力较高，需要开发一种气体输送系统，以确保设施的使用寿命和人员安全。数据采集和实验传播通过远程访问实现，以确保安全，并配备了基于LabVIEW和Python的用户界面。到目前为止，已经实现了270个大气压的测试压力、730个大气压的爆炸压力以及接近10000K的温度。该设施的极端条件使得在燃料混合物（如氩气和二氧化碳中稀释的烷烃）氧化过程中能够进行发射光谱分析。确定了点火延迟时间，并与使用化学动力学机制的模拟结果进行了比较。概述了设计、实验程序、分析过程和不确定度测定，并将典型压力曲线与新的气体动力学求解器以及在多个激波管设施中开发的经验关联进行了比较。文中还包括了初步的反应混合物分析以及对所述混合物的进一步研究。
