The critical heat flux occurring during upflow of boiling water in vertical smooth and porous-coated tubes were investigated experimentally. experiments performed at low pressures from 0.11-0.7 MPa mass fluxes 100-400 kg/m2s, with inlet subcoolings 1-70 K. carried out four test sections, two which porous coated by sintering. each the cases, smooth, had same geometries (L/D = 28.3, L/D 38.75) to...

Time-resolved in situ measurements of thermodynamic properties (pressure, temperature and species density) were performed the annular exhaust a methane-oxygen rotating detonation rocket engine (RDRE) using high-speed laser absorption spectroscopy. Bias-tee circuitry was coupled with distributed feedback quantum cascade near 5 ?m to spectrally-resolve cluster rovibrational transitions fundamenta...