“…The final part upstream of the exit plane has a constant cross-section. A detailed documentation of the flow characteristics in the near-outlet region is provided by Steinfurth & Weiss (2020 b ). Most notably, we measured distinct peaks both in the axial velocity component and in close to the outlet lips, the latter of which represents a manifestation of non-parallel flow, contributing to an enhanced vorticity flux ((1.1)).…”
Section: Specific Flow Configuration Of Non-parallel Planar Starting mentioning
confidence: 99%
“…Here, is oriented along the smaller outlet dimension with located on the centreline. Figure 2.( a ) Time-dependent pressure signal inside the jet exit plane; ( b ) evolution of velocity gradients corresponding to increase of vorticity flux due to over-pressure; based on depictions by Steinfurth & Weiss (2020 b ). …”
Section: Specific Flow Configuration Of Non-parallel Planar Starting mentioning
confidence: 99%
“…These initial conditions cause a drastic transverse advection of fluid close to the outlet, resulting in thick-cored vortex rings. For an analysis of these vortex rings generated in still surroundings, the reader is referred to our recent article (Steinfurth & Weiss 2020 b ).…”
Section: Specific Flow Configuration Of Non-parallel Planar Starting mentioning
confidence: 99%
“…Assuming that the control authority is mainly determined by the primary vortex ring, starting jets may be modulated to exclusively generate this flow structure, thereby enhancing the efficiency. Investigating starting jets ejected into still surroundings by means of a pulsed jet actuator (PJA), recent experiments by Steinfurth & Weiss (2020 b ) show that conclusions drawn from previous fundamental studies cannot be directly transferred to the PJA-generated starting jets often used in active flow control (AFC). Specifically, their expansion and entrainment rates are much larger as vortex rings with extremely thick cores are generated.…”
Section: Introductionmentioning
confidence: 99%
“…For such flows, it was previously observed by Afanasyev (2006) that the initial propagation speed is much smaller than for commonly investigated circular starting jets. Hence, vortex rings are located in close proximity to the outlet where they accumulate the ejected vorticity for a longer duration (Steinfurth & Weiss 2020 b ).…”
“…The final part upstream of the exit plane has a constant cross-section. A detailed documentation of the flow characteristics in the near-outlet region is provided by Steinfurth & Weiss (2020 b ). Most notably, we measured distinct peaks both in the axial velocity component and in close to the outlet lips, the latter of which represents a manifestation of non-parallel flow, contributing to an enhanced vorticity flux ((1.1)).…”
Section: Specific Flow Configuration Of Non-parallel Planar Starting mentioning
confidence: 99%
“…Here, is oriented along the smaller outlet dimension with located on the centreline. Figure 2.( a ) Time-dependent pressure signal inside the jet exit plane; ( b ) evolution of velocity gradients corresponding to increase of vorticity flux due to over-pressure; based on depictions by Steinfurth & Weiss (2020 b ). …”
Section: Specific Flow Configuration Of Non-parallel Planar Starting mentioning
confidence: 99%
“…These initial conditions cause a drastic transverse advection of fluid close to the outlet, resulting in thick-cored vortex rings. For an analysis of these vortex rings generated in still surroundings, the reader is referred to our recent article (Steinfurth & Weiss 2020 b ).…”
Section: Specific Flow Configuration Of Non-parallel Planar Starting mentioning
confidence: 99%
“…Assuming that the control authority is mainly determined by the primary vortex ring, starting jets may be modulated to exclusively generate this flow structure, thereby enhancing the efficiency. Investigating starting jets ejected into still surroundings by means of a pulsed jet actuator (PJA), recent experiments by Steinfurth & Weiss (2020 b ) show that conclusions drawn from previous fundamental studies cannot be directly transferred to the PJA-generated starting jets often used in active flow control (AFC). Specifically, their expansion and entrainment rates are much larger as vortex rings with extremely thick cores are generated.…”
Section: Introductionmentioning
confidence: 99%
“…For such flows, it was previously observed by Afanasyev (2006) that the initial propagation speed is much smaller than for commonly investigated circular starting jets. Hence, vortex rings are located in close proximity to the outlet where they accumulate the ejected vorticity for a longer duration (Steinfurth & Weiss 2020 b ).…”
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
