On the structure and dynamics of stratified wakes generated by submerged propagating objects
Moody, Zachary E.
Merriam, Christopher J.
MetadataShow full item record
The structure and intensity of the intermediate wake generated by a submerged propagating body in a stratified fluid was studied using a combination of (i) numerical simulations, (ii) field measurements, and (iii) laboratory experiments. The numerical component offered guidance for the field work performed in Monterey Bay (CA, USA) in the summer of 2015. The field work focused on subsurface thermal signatures of a submerged propagating object. Vertical temperature profiles suggested that long-term changes in thermal stratification can occur after the passage of a towed body. Horizontal temperature variability, measured by an autonomous underwater vehicle facilitated the identification of the wake using perturbation temperature variance as the key diagnostic variable. Analogous thermal signatures of stratified wakes were found in ocean observations and in modelling results. The influence of the tow ship on the wake was shown to be minimal. Laboratory experiments focused on the surface expression of stratified wakes were used to complement numerical simulations and field measurements. All three components of this project indicate that detection of the wake of a submerged object based on its thermal signatures is a viable and effective approach.
The article of record as published may be found at http://dx.doi.org/10.1080/1755876X.2017.1307801
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
STRATIFIED WAKE SIGNATURES GENERATED BY PROPAGATING SUBMERGED BODIES IN THE PRESENCE OF AN ACTIVE INTERNAL WAVE FIELD Dougherty, Jack C. (Monterey, CA; Naval Postgraduate School, 2020-06);This study characterizes the detectability of a stratified wake in the presence of background internal waves using numerical simulations. To achieve this, we conducted numerical simulations on Department of Defense ...
Guerrero, Rino M. (Monterey, CA; Naval Postgraduate School, 2018-06);Submerged bodies traveling through stratified ocean columns generate remotely detectable wakes due to perturbations in temperature and momentum. Using the Massachusetts Institute of Technology General Circulation Model ...
Newman, Thomas P. (Monterey, California. Naval Postgraduate School, 2014-12);A possible means of submersible detection is through the presence of surface signatures generated by a submerged body propagating in a stratified fluid. Direct numerical simulations (DNS) of perturbations generated by a ...