摘要: Capturing and understanding of the thermal effects present in supersonic flows is essential for further characterization of the flow interactions within them. A critical component of understanding is to be able to quantify the the... 展开 Capturing and understanding of the thermal effects present in supersonic flows is essential for further characterization of the flow interactions within them. A critical component of understanding is to be able to quantify the thermal gradients observed. Characterization of the temperature changes in supersonic flow has recently been demonstrated using a novel, non-intrusive technique. Resonantly ionized photoemission thermometry (RIPT) captures signals that can be directly imaged, and their intensity relationship to temperature. N_2 RIPT uses calibration studies of the temperature dependence on resonant excitation. This process liberates electrons from the N_2 molecules present resulting in the deexcitation emissions of ionized nitrogen. Demonstrated is the work associated with imaging the photoemission produced and assigning gas temperatures based on the calibration data along a 1D fluorescent line. The N_2 RIPT measurements are validated via previously established O_2 RIPT jet measurements. Capitalizing on the resonance-enhanced multi-photon ionization (REMPI) scheme of the nitrogen already present in the air, no tracers are needed for application. Also, because of the direct signal imaging of the photoemissions produced, RIPT requires less equipment and is much simpler to stage and align compared to other known techniques. 收起