摘要：【中文摘要】 目前在工程實踐中需要一種簡單而又準確的活塞流計算方法。本文分析了隧道列車活塞風特性,在隧道流體場中引入了宏觀動量守恒定律,建立了一種新型非恒定流活塞風一維解析方程,修正了常規一維解析方程物理意義不明確的缺陷。利用常規方法和新型方法分別對同一個工況進行求解,并將所得結果與實測值進行對比。結果表明新型活塞風解析方法具有較高的精度。 【英文摘要】 A simpler but more precise calculation method for piston fluid is now in great demand in engineering practice.A new one-dimensional analytic equation for unsteady piston wind flow was established based on the analysis of piston wind by tunnel train and consideration of macro momentum conservation law in the tunnel fluid,which modified the physical obscurity of conventional equation.The new and convention methods were used respectively to solve the piston fluid field of the same tunnels,and the solved results were compared with the actual measurements.Thus,the new analytic solution has a higher precision than the conventional one. 【中文關鍵詞】 活塞風; 數值模擬; 流體力學解析解; 隧道通風【英文關鍵詞】 piston wind; CFD; analytical solution of hydrodynamics; tunnel ventilation