scispace - formally typeset
Search or ask a question
Topic

Bend radius

About: Bend radius is a research topic. Over the lifetime, 3303 publications have been published within this topic receiving 35415 citations. The topic is also known as: minimum bend radius.


Papers
More filters
Journal ArticleDOI
TL;DR: An attenuation of 7 dB/km has been achieved over kilometre lengths of liquid-core, multi-mode optical fiber waveguide as discussed by the authors, where the measured pulse dispersion depends on the mode distribution launched and on mode conversion which is a function of bend radius.

35 citations

Journal ArticleDOI
TL;DR: In this article, an experimental study of swirling turbulent flow through a curved bend and its downstream tangent has been carried out, where the authors report on the recovery from swirl and bend curvature and rely on measurements obtained in the downstream tangents and data reported in Part 1 to assess the recovery.
Abstract: An experimental study of swirling turbulent flow through a curved bend and its downstream tangent has been carried out. This study reports on the recovery from swirl and bend curvature and relies on measurements obtained in the downstream tangent and data reported in Part 1 to assess the recovery. Unlike the nonswirling flow case, the present measurements show that the cross-stream secondary flow is dominated by the decay of the solid-body rotation and the total wall shear stress measured at the inner and outer bend (furthest away from the bend center of curvature) is approximately equal. The shear distribution is fairly uniform, even at 1 D downstream of the bend exit. At 49D downstream of the bend exit, the mean axial velocity has recovered to its measured profile at 18D upstream of the bend entrance. Furthermore, the mean tangential velocity is close to zero everywhere and the turbulent shear and normal stresses take another 15D to approximately approach their stationary straight pipe values. Therefore, complete flow recovery from swirl and bend curvature takes a total length of about 85D from the bend entrance. This compares with a recovery length of about 78D for bend curvature alone. The recovery length is substantially shorter than that measured previously in swirling flow through straight pipes and is a consequence of the angular momentum decreasing by approximately 74% across the curved bend. Consequently, the effect of bend curvature is to accelerate swirl decay in a pipe flow.

35 citations

Journal ArticleDOI
TL;DR: In this article, a twisted-stacked coated-conductor tape-in-conduit conductor (CICC) with a helically slotted core is proposed and tested.
Abstract: A high-temperature superconducting (HTS) cable-in-conduit conductor (CICC) suitable for high-field magnet applications and comprised of twisted-stacked coated-conductor tapes arranged around a helically slotted core has been recently proposed and tested, demonstrating full compatibility with existing cabling technologies. To form the desired shape of any coils for high-field magnet applications, any suitable CICC option needs to be bent. For a magnet design, it is then very important to characterize the bending behavior of the CICC and, in particular, to find the smallest bending radius achieved without performance degradation. To this aim, bending tests were carried out on 1-m-long dummy samples of five helical slots in an extruded aluminum core, in which four REBCO tapes and dummy stainless-steel tapes were mounted in each slot. A controlled bending moment has been applied to the HTS CICC samples at room temperature, and each individual superconducting tape has been electrically characterized as a function of bending radius by measuring the critical current and n-index values at 77 K in a self-field condition. Results are analyzed and explained with the help of a three-dimensional cable model implemented in ANSYS and analytical calculations. The experimental and numerical results presented in this paper will demonstrate that the twisted-stack slotted-core technology can meet the bending requirements of high-field magnet designs.

35 citations

Journal ArticleDOI
TL;DR: A new design of a single-mode optical fiber which exhibits ultra low bend sensitivity over a wide communication band is proposed, estimated to be as low as 4.4x10(-10) dB/turn for the bend radius of 10 mm.
Abstract: We propose a new design of a single-mode optical fiber (SMF) which exhibits ultra low bend sensitivity over a wide communication band (1.3 µm to 1.65 µm). A five-cladding fiber structure has been proposed to minimize the bending loss, estimated to be as low as 4.4×10-10 dB/turn for the bend radius of 10 mm.

35 citations

Patent
25 Feb 1998
TL;DR: In this paper, a bend stiffener is used to limit the bending radius of a flexible duct, where the flexible duct is fixed by a rear part on a fixed end support.
Abstract: The invention concerns a device for limiting the bending radius of a flexible duct comprising at least a bend stiffener (7) arranged around one length of the flexible duct and fixed by a rear part on a fixed end support (19), characterised in that it further comprises an element for maintaining (6, 6', 6') the bend stiffener (7) arranged between the flexible duct (1) and the bend stiffener (7) and comprising at least a portion capable of flexural bending extending over one length of the flexible duct located at least between the rear part and the end of the bend stiffener.

35 citations


Network Information
Related Topics (5)
Silicon
196K papers, 3M citations
78% related
Laser
353.1K papers, 4.3M citations
78% related
Thin film
275.5K papers, 4.5M citations
78% related
Coating
379.8K papers, 3.1M citations
77% related
Dielectric
169.7K papers, 2.7M citations
77% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202365
2022172
202181
2020112
2019135
2018153