این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Journal of Applied Fluid Mechanics، جلد ۱۸، شماره ۱۲، صفحات ۳۰۳۶-۳۰۵۲
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Study on the Cavitation Performances and Unsteady Characteristics of a Centrifugal Fire Pump
چکیده انگلیسی مقاله Centrifugal fire pumps are critical for firefighting systems but suffer from cavitation and instability under off-design conditions. However, systematic analyses of their flow-rate-dependent dynamics remain limited. This study systematically investigates the hydraulic performance, cavitation characteristics, and dynamic pressure pulsations of a centrifugal fire pump under various flow conditions (50%–150% of the design flow rate) through combined numerical simulations and experiments. Steady simulations were conducted using the standard κ-ε turbulence model, while unsteady simulations were performed with a 2° angular time step to capture the transient interactions between the impeller and the volute as well as the resulting dynamic pressure pulsations. Key results revealed that: At low flow (60% Qd)， Radial force amplitudes increased by 40%, accompanied by 9.86 Hz low-frequency pulsations attributed to backflow-induced instabilities; At high flow (150% Qd), The critical cavitation number σ₃% surged to 0.961, indicating a 2.6-fold cavitation risk compared to the design condition (σ₃% = 0.376); The findings provide actionable strategies for optimizing pump design and operational stability in firefighting systems.
کلیدواژه‌های انگلیسی مقاله Centrifugal fire pump,Hydraulic performance,Cavitation performance,Hydraulic forces,Unsteady characteristics,Pressure pulsation,Numerical simulation
نویسندگان مقاله J. Hao |
National Research Center of Pump, Jiangsu University, Zhenjiang 212013, Jiangsu, China

P. Zhang |
National Research Center of Pump, Jiangsu University, Zhenjiang 212013, Jiangsu, China

P. Zhang |
National Research Center of Pump, Jiangsu University, Zhenjiang 212013, Jiangsu, China

P. Zhang |
National Research Center of Pump, Jiangsu University, Zhenjiang 212013, Jiangsu, China

D. Hou |
Shanghai Kaiquan Pump (Group) Co. Ltd., Jiading 4255/4287, Shanghai, China

Y. Shen |
Zhenjiang Fire and Rescue Division, Zhenjiang 212000, Jiangsu, China

J. Yuan |
National Research Center of Pump, Jiangsu University, Zhenjiang 212013, Jiangsu, China

نشانی اینترنتی https://www.jafmonline.net/article_2764_b9a723b460339764cf041d0f1a71fc37.pdf
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات