Smaaart task order - title: supersonic combustion tests in the hypulse shock tube facility 1.0 introduction/background: in coordination with the national center for hypersonic combined cycle…

Smaaart task order - title: supersonic combustion tests in the hypulse shock tube facility 1.0 introduction/background: in coordination with the national center for hypersonic combined cycle propulsion (nchccp), NASA intends to support testing of the HY-v (high-five) scramjet flowpath model in the hypulse shock tube facility located at the ATK gasl facility in ronkonkoma, NY. HY-v was a funded program by the department of defense (DOD) test resource management centers advanced propulsion test technology focus area. This testing will produce a database for supersonic combustion at simulated hypervelocity flight speeds which will be utilized to help improve the understanding of the complex physics within a scramjet combustor. This is relevant to on-going work for the hypersonics project where the goal is ultimately to be able to design higher performance scramjet combustors. The scramjet mixing and combustion processes are known to have the greatest potential for improving scramjet engine performance and efficiency. The testing will extend the hypervelocity scramjet capability of both the NASA hypersonics project and the nchccp, also known as the center. This task will leverage the existing hardware and data of the HY-v test program. The hypulse facility will be operated in reflected shock tube (RST) mode to simulate a flight mach number of 7 with clean air test gas. The facility is operated by ATK gasl (general applied sciences laboratory). The contractor for this project shall be responsible for setting up and running the proposed tests. Fuel plume imaging (FPI) and tunable diode laser absorption spectroscopy (tdlas) along with traditional wall pressure and heat flux measurements will be conducted. The imaging will be used primarily for qualitative observation to give insight into flow physics and in comparison against computational modeling as well as the traditional wall pressure and heat flux measurements for the same purposes. These data will be post-processed into a database to be compared against computational fluid dynamics (CFD) models. 2.0 scope/objectives: the scope of this task order is to apply optical imaging in conjunction with conventional measurements to examine supersonic mixing and combustion in the HY-v flowpath model. The tests shall be implemented in the hypulse facility at ATK gasl, and will be utilized to support both NASA and the centers mutual need for experimental hypervelocity mixing data. The objectives of this task order are to: 1) perform facility and diagnostic shakedown tests. 2) perform testing at mach 7 simulated flight speed and record high fidelity FPI imaging, tdlas water concentration and temperature measurements, and pressure and heat flux measurements in fulfillment of the mach 7 test matrix requirements. 3) perform reduction and analysis of the experimental data for comparison to CFD prediction.