L773:1270 9638
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04347naa a2200385 4500 | |
| 001 | oai:lup.lub.lu.se:e574e954-b60b-4caf-b621-678b74929fd6 | |
| 003 | SwePub | |
| 008 | 220919s2022 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://lup.lub.lu.se/record/e574e954-b60b-4caf-b621-678b74929fd62 URI |
| 024 | 7 | a https://doi.org/10.1016/j.ast.2022.1078072 DOI |
| 040 | a (SwePub)lu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Chen, Yuqianu Lund University,Lunds universitet,Strömningsteknik,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Fluid Mechanics,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH,Nanjing University of Aeronautics and Astronautics4 aut0 (Swepub:lu)yu0502ch |
| 245 | 1 0 | a Study on ignition process and flame expansion and propagation characteristics in jet-cooled pilot flameholders using image processing techniques |
| 264 | 1 | b Elsevier BV,c 2022 |
| 520 | a Wall-type pilot flameholder has been used in aero-engines to effectively create a stable ignition source and achieve an excellent ignition performance in high-velocity flows. The ignition delay, flame propagation, and flame boundary are crucial characteristics to evaluate the performance of pilot flameholders. Previous work displayed the significantly changed ignition performance and flow features of the wall flameholder when jet cooling schemes were adopted, indicating that the ignition process and the flame features strongly depend on the cooling jet and the optimal design of jet cooling schemes needs further investigation. Therefore, in this study, two practical image processing algorithms are developed to characterize the flame development of the ignition process, reveal the effect of cooling schemes on the ignition delay time, and quantitatively analyze the flame area and expansion ratio of the wall flameholder during stable combustion. Two image processing methods proposed based on MATLAB algorithms exhibit effectiveness in studying the ignition process and flame expansion characteristics. The ignition process is divided into four phases: kernel generation, kernel propagation, flame growth, and stable combustion. Meanwhile, the ignition delay time is identified by counting the total pixels of the flame projected region during the ignition process. The edge detection and pixel statistics of the flame projected region in the binary luminosity image show the flame boundary and expansion ratio under various working conditions. It was found that the cooling jet angle has a significant impact on the ignition process, ignition delay time, flame propagation, and steady flame features. The pressure-driven gas jet cooling scheme with a smaller jet angle and the external-inhaled air cooling scheme with a larger jet angle present a better capability of ignition and flame expansion and propagation. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng |
| 653 | a Edge detection | |
| 653 | a Flame expansion | |
| 653 | a Ignition delay | |
| 653 | a Ignition process | |
| 653 | a Image processing | |
| 653 | a Pilot flameholder | |
| 700 | 1 | a Fan, Yuxinu Nanjing University of Aeronautics and Astronautics4 aut |
| 700 | 1 | a Han, Qixiangu Nanjing University of Aeronautics and Astronautics4 aut |
| 700 | 1 | a Bai, Xue Songu Lund University,Lunds universitet,Strömningsteknik,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Energiomställningen,LTH profilområden,Fluid Mechanics,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,LTH Profile areas,Faculty of Engineering, LTH4 aut0 (Swepub:lu)vok-xba |
| 710 | 2 | a Strömningsteknikb Institutionen för energivetenskaper4 org |
| 773 | 0 | t Aerospace Science and Technologyd : Elsevier BVg 129q 129x 1270-9638 |
| 856 | 4 | u http://dx.doi.org/10.1016/j.ast.2022.107807y FULLTEXT |
| 856 | 4 8 | u https://lup.lub.lu.se/record/e574e954-b60b-4caf-b621-678b74929fd6 |
| 856 | 4 8 | u https://doi.org/10.1016/j.ast.2022.107807 |
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