Shallow angle water entry of ballistic projectiles

Abstract: The water-entry of ballistic projectiles is investigated using high-speed digital imaging to capture the subsurface cavity dynamics. Specially designed 0.22 caliber projectiles are fired into water at shallow angles to the free surface (5º to 15º) at Mach numbers between 0.3 and 1.0. Redesigned projectile tip geometries allowed projectiles to successfully enter the [...]

October 17th, 2015|Conference|

Three dimensional flow field PIV and biological sensing using synthetic aperture, Proceedings of the 16th International Symposium on Unmanned Untethered Submersible Technology (UUST09)

Citation: Truscott, T. T., Belden, J. & Techet, A. H., Three dimensional flow field PIV and biological sensing using synthetic aperture, Proceedings of the 16th International Symposium on Unmanned Untethered Submersible Technology (UUST09), Durham, New Hampshire, August 23-26, 2009.

October 17th, 2015|Conference|

Three dimensional Flow Fields Using Synthetic Aperture PIV, 8th International Symposium on Particle Image Velocimetry

Citation: Belden, J., Truscott, T. T., & Techet, A. H., "Three dimensional flow fields using synthetic aperture PIV." 8th International Symposium on Particle Image Velocimetry, Melbourne, Australia, August 25-28, 2009.

October 17th, 2015|Conference|

Integration of hands-on laboratory modules to enhance the introduction of ocean science and engineering to undergraduates

Abstract: Ocean science and engineering are exciting and active fields industry as well as academia. “Revolutionizing” marine science and technology requires that future generations have access to strong academic programs in ocean science and engineering. Undergraduates pursing degree programs in ocean engineering at the Massachusetts Institute of Technology (MIT) are introduced to a wide [...]

October 17th, 2015|Conference|

Eggs and milk: Spinning spheres partially immersed in a liquid bath, 2015

Abstract: When a hard-boiled egg spins through a pool of milk on the kitchen counter, the milk rises up the sides of the egg and droplets are ejected. This phenomenon occurs when any partially submerged object whose radius increases upward from the fluid surface (e.g., spheres, inverted cones, and rings) spins in [...]

October 13th, 2015|2015, Publications|

Water-skipping stones and spheres, 2014

Abstract: A highly deformable elastic sphere may bounce poorly on land, but it will skip spectacularly on water. Citation and Link: Truscott, T.T., Belden, J. & Hurd, R., “Water-skipping stones and spheres.” Physics Today, 67, 12, 70, DOI: 10.1063/PT.3.2631, December 2014. 

October 13th, 2015|2014, Publications|

Three-dimensional flow measurements on flapping wings using synthetic aperture PIV, 2014

Abstract: We present the results of 3D velocity mea- surements of the flow fields around a free-flying painted lady butterfly (Vanessa cardui) and a tethered mechanical flapper using Synthetic Aperture PIV (SAPIV). The velocity fields presented for the free-flying butterfly have limited spatial resolution; however, leading edge vortices (LEV) and trailing edge [...]

October 13th, 2015|2014, Publications|

Catastrophic cracking courtesy of quiescent cavitation, 2014

Abstract: Not available. Citation and Link: Daily, J., Pendlebury, J., Langley, K., Hurd, R., Thomson, S. & Truscott, T., “Catastrophic cracking courtesy of quiescent cavitation”, Physics of Fluids, 26, 091107, DOI: 10.1063/1.4894073, September 2014.

October 13th, 2015|2014, Publications|

The water entry of slender axisymmetric bodies, 2014

Abstract: We present a study of the forces, velocities, and trajectories of slender (length/diameter = 10) axisymmetric projectiles using an embedded inertial measurement unit (IMU). Three nose shapes (cone, ogive, and flat) were used. Projectiles were tested at vertical and oblique impact angles with different surface treatments. The trajectory of a half-hydrophobic [...]

October 13th, 2015|2014, Publications|

Air-coupled impact-echo delamination detection in concrete using spheres of ice for excitation, 2013

Abstract: The aims of this paper are to demonstrate that ice can be used as a suitable impactor to excite the acoustic modes in concrete associated with delaminations and to compare ice sphere impacts with traditional steel ball impacts. Simultaneous acoustic recordings and high-speed photography of representative low-velocity impacts with parametric analysis [...]

October 13th, 2015|2013, Publications|