Dual-Mode Combustion of a Jet in Cross-Flow with Cavity Flameholder

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76653/1/AIAA-2008-1062-949.pd

Reaction Zone Imaging in a Dual-Mode Scramjet Combustor Using CH-PLIF

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76449/1/AIAA-2008-5071-723.pd

Stratified Jet Flames in a Heated (1364K) Cross-Flow with Auto-ignition

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90683/1/AIAA-2011-321-580.pd

Heat Release Distribution in a Dual-Mode Scramjet Combustor - Measurements and Modeling

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76761/1/AIAA-2009-7362-475.pd

Combustion Stabilization, Structure, and Spreading in a Laboratory Dual-Mode Scramjet Combustor.

Dual-mode scramjets have the potential to provide efficient, air-breathing propulsion at high flight Mach numbers. Flame stabilization and spreading are a challenge in such engines due to the very high flow velocities. Combustion occurs in a complex regime where both flame properties and auto-ignition reactions are expected to be important. The focus of the current study is to improve the physical understanding of the combustion mechanism and its practical implication in such combustors. Topics of interest are the combustion stabilization locations, the detailed structure of the reaction zone, and the physical mechanisms controlling the heat release distribution. A facility was developed for the experimental investigation of a laboratory dual-mode scramjet combustor at conditions equivalent to flight Mach numbers of 4.3 to 5.5. The combustor contained flush wall fuel injection and a cavity flameholder, which are the basic flow elements in many proposed practical designs. The diagnostics used include high speed movies of the chemiluminescence, wall pressure measurements, and planar laser induced fluorescence of CH, and simultaneous OH/formaldehyde. The study revealed two distinct reaction zone structures that are caused by two flame anchoring locations. Cavity stabilized combustion occurs at low stagnation temperatures. For these conditions the reaction zone is anchored at the cavity leading edge and the flame spreading is controlled by premixed flame propagation. Jet-wake stabilized combustion occurs at high stagnation temperatures. The reaction zone is a lifted jet flame, which has a premixed base and a downstream diffusion flame. In all cases, initial auto-ignition reactions occur well upstream of the primary reaction zone, resulting in an auto-ignition assisted flame base. The results are useful for developing physics based models of the combustion.Ph.D.Aerospace EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/76012/1/micka_1.pd

Scramjet Engine Model MASIV: Role of Mixing, Chemistry and Wave Interaction

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77155/1/AIAA-2009-4939-816.pd

Capturing chaotic chromosomes: Pairing in action

Accurate chromosome segregation is critical for the formation of haploid gametes, and therefore healthy offspring. Errors in segregation result in aneuploidy, which increases exponentially with maternal age (Hassold and Hunt, 2001). Maternally aged mouse oocytes were recently found to exhibit premature sister chromatid separation due to reduced levels of Securin, an essential regulator of sister chromatid cohesion (Nabti et al, 2017). This landmark finding was facilitated by using chromosome spreads that allow for the visualization of meiotic processes, such as recombination, synapsis, crossing over, and cohesion. This powerful technique is easy to perform and analyze, and allows for the identification of markers for different processes, including DNA damage and repair.Fil: Bertucci, Micka C.. University of Chicago; Estados UnidosFil: Das, Arunika. University of Chicago; Estados UnidosFil: Fitzgerald, Harriet C.. University of Chicago; Estados UnidosFil: Goszczynski, Daniel Estanislao. University of Chicago; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

A Scramjet Engine Model Including Effects of Precombustion Shocks and Dissociation

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76382/1/AIAA-2008-4619-101.pd

Electrical, morphological and structural properties of Ti ohmic contacts formed on n-type 4H–SiC by laser thermal annealing

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