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Experimental and Numerical Investigation of Tip Leakage Flows in a Roots Blower

التفاصيل البيبلوغرافية
العنوان: Experimental and Numerical Investigation of Tip Leakage Flows in a Roots Blower
المؤلفون: Shuaihui Sun, Gursharanjit Singh, Ahmed Kovacevic, Christoph Bruecker
المصدر: Designs, Vol 4, Iss 1, p 3 (2020)
بيانات النشر: MDPI AG, 2020.
سنة النشر: 2020
المجموعة: LCC:Technology
LCC:Engineering design
مصطلحات موضوعية: positive displacement machines, roots blower, micro piv, tip leakage flows, cfd, Technology, Engineering design, TA174
الوصف: Computational fluid dynamics (CFD) can help in understanding the nature of leakage flow phenomena inside the rotary positive displacement machines (PDMs). However, due to the lack of experimental results, the analysis of leakage flows in rotary PDMs by CFD has not yet been fully validated. Particle image velocimetry (PIV) tests with a microscopic lens and phase-lock were conducted to obtain the velocity field around the tip gap in an optical Roots blower. The three-dimensional unsteady CFD model of the Roots blower with the dynamic grids generated by Screw Compressor Rotor Grid Generation (SCORG) was established to predict the gap flow under the same operating conditions. The images obtained by the PIV tests were analyzed and some factors which compromise the quality of test results in the gap flow were identified, such as reflections and transparency of the window. The flow fields obtained by CFD have the same flow pattern and velocity magnitude as the experimental results in the majority of observed regions but overestimate the leakage flow velocity. The CFD results show a vortex induced by the leakage flow in the downstream region of the gap. The flow losses in the tip gap mainly happen at the entrance upstream of the gap. Finally, some suggestions for future work are discussed.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2411-9660
Relation: https://www.mdpi.com/2411-9660/4/1/3; https://doaj.org/toc/2411-9660
DOI: 10.3390/designs4010003
URL الوصول: https://doaj.org/article/ccbf3f409d8a4c9e98576d9e3a410234
رقم الأكسشن: edsdoj.bf3f409d8a4c9e98576d9e3a410234
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:24119660
DOI:10.3390/designs4010003