燃气轮机进气系统阻力特性修正方法

Gas Turbine Intake System Resistance Characteristics Correction Method

中文关键词:  进气系统  阻力特性  修正方法  燃气轮机

英文关键词:air intake system  resistance characteristics  correction method  gas turbine

中文摘要:

      由于燃气轮机进气系统部件的试验环境、测试方法、进出口边界条件等和整机的试验环境存在差异，导致部件在单独试 验条件下获取的工作特性不完全等同于整机环境下的部件工作特性。为了解决这一问题，针对燃气轮机进气系统各部件，基于已 有部件试验和整机缩比试验数据，采用试验验证和数值仿真的方法，开展了各因素对于部件工作特性的影响机理研究。通过分析 单独试验和整机试验环境条件下试验器结构、边界条件和测试方法等因素的差别，总结了各因素对于部件流动特征、阻力损失的 作用规律，建立部件在整机环境下的考虑多因素耦合影响的工作特性修正方法。结果表明：燃气轮机进气系统修正模型主要基于 进气百叶窗的进气不均匀度、进气蜗壳的雷诺数以及进气风速风向等因素进行修正，修正所得到的阻力特性与整机仿真吻合较 好。修正误差基本都在1%以下，修正模型计算精度较高。

英文摘要:

      Due to the differences in test environment, test method, and inlet and outlet boundary conditions between the component test of the gas turbine intake system and the entire marine propulsion system test, component performance characteristics obtained under the individual component test conditions do not fully match those obtained under the marine application environment. To solve this problem, based on the existing component test data and the scaled-down entire marine propulsion system test data, a study of the influence mechanisms of various factors on component performance characteristics was conducted for each component of the gas turbine intake system by means of experimental verification and numerical simulation. By analyzing the differences in test rig structure, boundary condi? tions, and test methods between individual component tests and the environment of the entire marine propulsion system tests, the influence laws of various factors on the flow characteristics and pressure losses of the intake system components were summarized, and the components performance characteristics correction methods in the marine application environment, taking into account the multi-factor coupling influences, were established. The results show that the correction model of the gas turbine intake system is mainly based on factors such as the intake louver non-uniformity, the intake volute Reynolds number, and the intake wind speed and direction, etc. The corrected resistance characteristics show good agreement with the simulation under the marine application environment, with correction errors typi? cally less than 1%, indicating high accuracy.