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Real-time emissions measurement and analysis at AEDC are performed by the Applied Technology Department. During fiscal year 1995, there was a major increase in the number of requirements for emissions measurements in support of ground testing at AEDC. This ambitious schedule required the best path through research, design, and implementation of data acquisition and analysis procedures. Therefore, the preparations for each test included improvements to emissions measurement methodology. These improvements could then be implemented on all subsequent tests so that overall testing methodology was continuously improved, and the time between testing and final data analysis was minimized. The objectives of this paper are to identify accomplishments in real-time emissions monitoring and improvements in emissions measurement and analysis capability at AEDC.

Mach-flow angularity probes were developed for use in scramjet flow path probe rakes. Prototype probes were fabricated to demonstrate the assembly processes (numerical control machining, furnace brazing, and electron beam welding). Tests of prototype probes confirmed the thermal durability margins and life cycle. Selected probes were calibrated in air at Mach numbers from 1.75 to 6.0. Acceptance criteria for the production probes stressed thermal durability and pressure (and, consequently, Mach number) measurement quality. This new water-cooled MFA probe has 0.397-cm shaft diameter and is capable of withstanding heat fluxes of 2.724 kW/cm2.