| Gas turbine has high quality requirements in air intake system.When low quality air enters gas turbine,not only usual operation will be influenced,it will also bring unrecoverable damage to internal components of gas turbine.Working principle is: when liquid droplets enter from inlet with intake air,it collides on the wall impacted by inertia effects.Due to droplet gravity,liquid fail to keep pace with air movement,which formed into film and accumulated gradually,discharged by drainage channel.Finally,gas and water are separated.From the view of inertial wave plate demister with zero thickness drainage channels,mathematical modeling and numerical simulation in variety geometries were made to different parameter size combinations.Research the pressure loss in single air intake cases,and droplets separation efficiency in liquid flow cases.Through variety model calculated in pressure loss,get relationship between drag characteristics with blade width,height,distance,turbulence model,inlet velocity,drainage channel structure is explored.Use orthogonal design.Apply drag experiment to study comparatively comparing with pressure loss by CFD method.Researches in paper are as follows:CFD studies in drag characteristics of inertial wave plate demister.Establish models in different blade length,height and distance.Select appropriate mesh quantity,turbulence model,control equations to predict numerically on models pressure loss in different velocities.Analyze several kinds of flow fields posted from CFD,which combined with analog data,summarized relationship between structure dimensions and drag characteristics.Numerically study on demisting characteristics.Based on drag calculation models,research influence of main structural parameters like,particle diameters,particle distribution velocity of intake air,drainage channels,turbulence model in separation performance of demister by CFD method.From the perspective of flow field,describe relationship between changing factors and separation efficiency.Use orthogonal test for drag and efficiency data processing.Numerical results were analyzed and summarized caused by structural parameters.Provide reasonable tool for future research and practical application for reference in demister and basis for optimizing selection and inertial wave plate demister design.Experiment research.Select available inertial demister model in the article.Use 3D printer machined models.Apply wind tunnel experiments to study its actual drag characteristics.Average error gap between CFD results and experiment in drag value is 3.06%.It indicates that drag characteristics model can assess drag characteristics pretty accurately. |
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