این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Journal of Applied Fluid Mechanics، جلد ۱۸، شماره ۴، صفحات ۱۰۹۸-۱۱۱۴
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Numerical Study of a Supersonic Nozzle Gas Jet Laden with a Dry Powder Fire-extinguishing Agent Injected from a Bypass Injector
چکیده انگلیسی مقاله To enhance the firefighting capabilities of traditional dry powder extinguishers, we incorporated an air-assisted supersonic nozzle, which is simulated using Euler-Lagrange interphase coupling to simulate the injection of firefighting agents into a supersonic, two-dimensional axisymmetric gas flow from a bypass injector. During the simulation, we employed our newly developed modified drag coefficient model, capable of accommodating a broad spectrum of particle Reynolds and Mach number conditions. Parameter studies show that an increase in the injector position, angle, and total pressure ratio generally causes a decrease in the average particle velocity vp,a, and an increase in the dispersion Ψp and velocity unevenness Φvp; an increase in the total pressure ratio of the main nozzle leads to an increase in Φvp and vp,a. However, under specific conditions, the monotonic dependency upon these parameters may be disrupted. For example, the performance indicators at the position of the injector near the nozzle throat and a larger total injector pressure ratio, as well as vp,a at smaller injection angles and Ψp at larger injection angles, may run counter to the monotonicity.
کلیدواژه‌های انگلیسی مقاله Corrected drag model,Dry powder fire extinguishing,Euler‒Lagrange,Gas jet,Supersonic nozzle
نویسندگان مقاله L. Zhang |
School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

Y. Feng |
School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

Y. Feng |
School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

H. Guan |
School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

نشانی اینترنتی https://www.jafmonline.net/article_2618_efa2c16a73632eaaeb809f5303f74ed9.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