Ignition and combustion of aluminum particles in shocked H2O/O2/Ar and CO2/O2/Ar mixtures

Gas-Phase Reaction in Nanoaluminum Combustion

“…The shock tube allows us to produce high temperature, high pressure, controlled environment combustion conditions and vary the particle diameter injected into the tube. Descriptions and dimensions of the shock tube can be found in previous publications (Bazyn, 2006b;Roberts et al, 1993;Servaites et al, 2001). Through the pressure ratio of the driver and driven sections, a strength selectable shock can produce a controlled combustion environment for approximately 2 ms in this shock tube.…”

On the Role of Carbon Dioxide in the Combustion of Aluminum Droplets

“…We have found e CO 2 ¼ (0.38 AE 0.05). However, for Olsen and Beckstead (1995), Legrand (2000), or Servaites et al (2001) Olsen and Beckstead (1995) (e H 2 O ¼ 0.53; e CO 2 ¼ 0.14) and Legrand (2000) (e CO 2 ¼ 0.14). These estimations of ''oxidizer efficiencies'' allow establishing a hierarchy between the three major oxidizers such as e O 2 % 2 Á e H 2 O % 6 Á e CO 2 .…”

Nevada National Security Site Site-Directed Research and Development FY 2014 Annual Report

“…Relative amplitudes of these lines have been used to infer the temperature of the upper atmosphere from line emission from rocket propellant combustion by-products (Harang 1966). The relative amplitudes of the three peaks shown in Figure 6 (A/B and C/B) were used by Servaites (2001) to infer effective temperatures of AlO combustion in CO2 and H2O based on a detailed molecular emission model (Colibaba-Evulet 2000). Applying Servaites' simplified analysis to our measured amplitude ratios, both ~0.5 ±0.15, gives an effective temperature of 3300 ±1000 K. This is consistent with the temperatures within the shocked gas bow-wake as calculated by CTH (see Figure 2).…”