NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT)

S. Wiggins Cody; B. Carasik Lane; E. Ruggles Arthur

NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT)

S. Wiggins Cody, B. Carasik Lane, E. Ruggles Arthur

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Twisted tape inserts are often used to enhance the performance of heat exchangers. Simulations suggest the existence of secondary flows and modified axial velocity profiles in these swirled flows, with only limited experimental evidence for these predictions. In this work, positron emission particle tracking (PEPT) is used to interrogate turbulent twisted tape swirl flow in a pipe. PEPT is a noninvasive, radiotracer based flow measurement technique that does not require optical access, making it suitable for measurements in a number of engineering flow systems. The existence of the altered velocity profile and secondary flows is confirmed, and flow is seen to still be developing 20 diameters downstream of the twisted channel entrance. These results are in line with predictions and point to possible regions of reduced heat transfer and hot spots in twisted tape based heat exchangers. Suggestions are made for future experiments to investigate heated flows, utilizing the ability of PEPT to image flows in opaque systems for validating simulation of flows in engineering equipment.

Original language	English
Title of host publication	ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics
Publisher	American Nuclear Society
Pages	211-222
Number of pages	12
ISBN (Electronic)	9780894487774
State	Published - 2020
Externally published	Yes
Event	2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020 - Virtual, Online Duration: Oct 20 2020 → Oct 23 2020

Publication series

Name	ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics

Conference

Conference	2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020
City	Virtual, Online
Period	10/20/20 → 10/23/20

Funding

Financial support for this work was provided by the National Nuclear Security Administration Stewardship Sciences Academic Alliances and a Nuclear Energy University Program Integrated University Program graduate fellowship.

Keywords

Flow Measurement
Heat Transfer Devices
Positron Emission Particle Tracking
Twisted Tape

Cite this

Cody, S. W., Lane, B. C., & Arthur, E. R. (2020). NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT). In ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics (pp. 211-222). (ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics). American Nuclear Society.

Cody, S. Wiggins ; Lane, B. Carasik ; Arthur, E. Ruggles. / NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT). ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics. American Nuclear Society, 2020. pp. 211-222 (ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics).

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title = "NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT)",

abstract = "Twisted tape inserts are often used to enhance the performance of heat exchangers. Simulations suggest the existence of secondary flows and modified axial velocity profiles in these swirled flows, with only limited experimental evidence for these predictions. In this work, positron emission particle tracking (PEPT) is used to interrogate turbulent twisted tape swirl flow in a pipe. PEPT is a noninvasive, radiotracer based flow measurement technique that does not require optical access, making it suitable for measurements in a number of engineering flow systems. The existence of the altered velocity profile and secondary flows is confirmed, and flow is seen to still be developing 20 diameters downstream of the twisted channel entrance. These results are in line with predictions and point to possible regions of reduced heat transfer and hot spots in twisted tape based heat exchangers. Suggestions are made for future experiments to investigate heated flows, utilizing the ability of PEPT to image flows in opaque systems for validating simulation of flows in engineering equipment.",

keywords = "Flow Measurement, Heat Transfer Devices, Positron Emission Particle Tracking, Twisted Tape",

author = "Cody, \{S. Wiggins\} and Lane, \{B. Carasik\} and Arthur, \{E. Ruggles\}",

note = "Publisher Copyright: {\textcopyright} ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics.All rights reserved.; 2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020 ; Conference date: 20-10-2020 Through 23-10-2020",

year = "2020",

language = "English",

series = "ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics",

publisher = "American Nuclear Society",

pages = "211--222",

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Cody, SW, Lane, BC & Arthur, ER 2020, NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT). in ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics. ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics, American Nuclear Society, pp. 211-222, 2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020, Virtual, Online, 10/20/20.

NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT). / Cody, S. Wiggins; Lane, B. Carasik; Arthur, E. Ruggles.
ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics. American Nuclear Society, 2020. p. 211-222 (ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Cody, S. Wiggins

AU - Lane, B. Carasik

AU - Arthur, E. Ruggles

PY - 2020

Y1 - 2020

N2 - Twisted tape inserts are often used to enhance the performance of heat exchangers. Simulations suggest the existence of secondary flows and modified axial velocity profiles in these swirled flows, with only limited experimental evidence for these predictions. In this work, positron emission particle tracking (PEPT) is used to interrogate turbulent twisted tape swirl flow in a pipe. PEPT is a noninvasive, radiotracer based flow measurement technique that does not require optical access, making it suitable for measurements in a number of engineering flow systems. The existence of the altered velocity profile and secondary flows is confirmed, and flow is seen to still be developing 20 diameters downstream of the twisted channel entrance. These results are in line with predictions and point to possible regions of reduced heat transfer and hot spots in twisted tape based heat exchangers. Suggestions are made for future experiments to investigate heated flows, utilizing the ability of PEPT to image flows in opaque systems for validating simulation of flows in engineering equipment.

AB - Twisted tape inserts are often used to enhance the performance of heat exchangers. Simulations suggest the existence of secondary flows and modified axial velocity profiles in these swirled flows, with only limited experimental evidence for these predictions. In this work, positron emission particle tracking (PEPT) is used to interrogate turbulent twisted tape swirl flow in a pipe. PEPT is a noninvasive, radiotracer based flow measurement technique that does not require optical access, making it suitable for measurements in a number of engineering flow systems. The existence of the altered velocity profile and secondary flows is confirmed, and flow is seen to still be developing 20 diameters downstream of the twisted channel entrance. These results are in line with predictions and point to possible regions of reduced heat transfer and hot spots in twisted tape based heat exchangers. Suggestions are made for future experiments to investigate heated flows, utilizing the ability of PEPT to image flows in opaque systems for validating simulation of flows in engineering equipment.

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KW - Heat Transfer Devices

KW - Positron Emission Particle Tracking

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BT - ATH 2020 - International Topical Meeting on Advances in Thermal Hydraulics

PB - American Nuclear Society

T2 - 2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020

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ER -

NONINVASIVE INTERROGATION OF LOCAL FLOW PHENOMENA IN TWISTED TAPE SWIRLED FLOW VIA POSITRON EMISSION PARTICLE TRACKING (PEPT)

Abstract

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Keywords

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