High-Speed Stereographic Imaging System for Multiphase Flows
Abstract
The advancement of Department of Defense mission capabilities requires temporally fast, phase/material contrast imaging techniques for the study of a variety of multiphase flow henomena found in applications ranging from rocket ombustion systems to ship wakes. The high-speed interrogation of such flows re particularly challenging, as highly dynamic and direct visible light visualization is hampered by (1) high scattering environments (e.g., sprays, cavitation clouds), (2) strong background luminosity (propellants, detonations), and/or (3) optically opaque environments (penetrators). The objective of this equipment acquisition proposal is to assemble the needed equipment to provide high-speed X-ray- and laser-based stereographic imaging of multiphase flows to inform fundamental flow and combustion physics relevant to DoD interests. The equipment includes two CMOS detectors capable of 20 kHz full frame detection and the associated positioning, control, data acquisition, and analysis components. The equipment will be installed in an existing one-ofa-kind X-ray flow visualization facility, and will also be used in advanced laser diagnostic laboratories to provide unique X-ray- and laser-based imaging capabilities for high-speed 2D and 3D analysis of multiphase flow systems.The initial problems in which this equipment will be used include: high-speed X-ray stereography of sprays, high-speed video pyrometry and species mapping, and high-speed holography and imaging of metallized combustion events. The equipment will also be utilized in future work addressing: (1) high-speed measurement of cavitation void inception, (2) high-speed phase contrast imaging, diffraction, and tomography of piezoelectrically controllable energetic materials, (3) high-speed tomoPIV and PLIF imaging of sprays (4) microwave susceptible nanoenergetic fuel additives for microexplosion ignition and flame holding, and (5) high-speed X-ray stereography of plunging liquid jets and projectiles. Integration of two high-speed detectors with existing unique, state-of-the-art multiphase flow diagnostic capabilities at ISU will enable high spatio-temporal measurements of phase/material contrast, species, and temperature that will advance DoD-supported discoveries at ISU in areas of combustion systems (e.g., sprays, propellants, etc.), as well as fluid-structure interactions (e.g., projectiles, ship spray and cavitation, etc.). This one-of-a-kind capability integrating advanced Xray stereography and laser-diagnostic capabilities will result in long-ranging impact on current and future projects having high DoD program impact.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2018
- Source ID
- N000141812380
Entities
People
- Theodore J. Heindel
Organizations
- Iowa State University
- Office of Naval Research
- United States Navy