Simultaneous two-plane flame front detection using PIV based on defocusing
This Letter presents a simultaneous two-plane flame front detection method. It is based on a standard single-camera single-plane particle image velocimetry (PIV) system in combination with an inexpensive and compact image splitting device. The image splitting optics places images from two depth-offs...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Optica Publishing Group
2024
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| _version_ | 1826311934097489920 |
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| author | He, Q Willman, C Williams, BAO |
| author_facet | He, Q Willman, C Williams, BAO |
| author_sort | He, Q |
| collection | OXFORD |
| description | This Letter presents a simultaneous two-plane flame front detection method. It is based on a standard single-camera single-plane particle image velocimetry (PIV) system in combination with an inexpensive and compact image splitting device. The image splitting optics places images from two depth-offset planes onto the two halves of a camera sensor. A shallow depth of field ensures only one plane is in focus on each half of the sensor. By using a high-pass filter and a novel two-step filter we have devised, the out-of-focus particle images are effectively removed, while the in-focus particle images remain, allowing the turbulent flame fronts on two planes to be detected simultaneously. Our approach could be combined with conventional polarization/wavelength discrimination methods to achieve simultaneous multi-plane flame front reconstruction with similarly high in-plane spatial resolution to single-plane measurement and is suitable for practical combustion devices with limited optical access. |
| first_indexed | 2024-03-07T08:20:05Z |
| format | Journal article |
| id | oxford-uuid:6210168a-b3c2-4ae4-9c6e-30de94e3e9a7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:20:05Z |
| publishDate | 2024 |
| publisher | Optica Publishing Group |
| record_format | dspace |
| spelling | oxford-uuid:6210168a-b3c2-4ae4-9c6e-30de94e3e9a72024-01-23T15:23:26ZSimultaneous two-plane flame front detection using PIV based on defocusingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6210168a-b3c2-4ae4-9c6e-30de94e3e9a7EnglishSymplectic ElementsOptica Publishing Group2024He, QWillman, CWilliams, BAOThis Letter presents a simultaneous two-plane flame front detection method. It is based on a standard single-camera single-plane particle image velocimetry (PIV) system in combination with an inexpensive and compact image splitting device. The image splitting optics places images from two depth-offset planes onto the two halves of a camera sensor. A shallow depth of field ensures only one plane is in focus on each half of the sensor. By using a high-pass filter and a novel two-step filter we have devised, the out-of-focus particle images are effectively removed, while the in-focus particle images remain, allowing the turbulent flame fronts on two planes to be detected simultaneously. Our approach could be combined with conventional polarization/wavelength discrimination methods to achieve simultaneous multi-plane flame front reconstruction with similarly high in-plane spatial resolution to single-plane measurement and is suitable for practical combustion devices with limited optical access. |
| spellingShingle | He, Q Willman, C Williams, BAO Simultaneous two-plane flame front detection using PIV based on defocusing |
| title | Simultaneous two-plane flame front detection using PIV based on defocusing |
| title_full | Simultaneous two-plane flame front detection using PIV based on defocusing |
| title_fullStr | Simultaneous two-plane flame front detection using PIV based on defocusing |
| title_full_unstemmed | Simultaneous two-plane flame front detection using PIV based on defocusing |
| title_short | Simultaneous two-plane flame front detection using PIV based on defocusing |
| title_sort | simultaneous two plane flame front detection using piv based on defocusing |
| work_keys_str_mv | AT heq simultaneoustwoplaneflamefrontdetectionusingpivbasedondefocusing AT willmanc simultaneoustwoplaneflamefrontdetectionusingpivbasedondefocusing AT williamsbao simultaneoustwoplaneflamefrontdetectionusingpivbasedondefocusing |