In this thesis work , a 1 - d hydraulic transient model and a 2 - d compressible flow model with the large eddy simulation approach have been applied to analyse the hydrodynamic process of the unsteady separated flow . prototype observation data of gezhouba shiplock no . 3 has been used to verify the computational results . it has been found that two different types of flow regime - stably - varying and strongly - oscillating regimes - could occur in the radial gate tunnel 本文采取將一維非恒定流模型與二維可壓縮流一大渦模擬模型相結(jié)合的方法,分析了急變分離流的水動(dòng)力學(xué)特性,并利用葛洲壩三號(hào)船閘的原型觀測(cè)資料驗(yàn)證了數(shù)值模型的可靠性,發(fā)現(xiàn)閥門段存在平穩(wěn)變化型和劇烈振蕩型兩種不同的流態(tài),并詳細(xì)計(jì)算、分析了它們的流動(dòng)特征