توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Performance Prediction Modeling of Axial–Flow compressor by Using of Loss models
نویسنده(ها): ، ، ،
اطلاعات انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک، سال
تعداد صفحات: ۴
Axial flow compressor is one of the most important parts of gas turbine units. Therefore, its design and performance prediction are very important. Onedimensional modeling is a simple, fast and accurate method for performance prediction of any type of compressors with different geometries. In this approach, inlet flow conditions and compressor geometry are known and by considering various compressor losses, velocity triangles at rotor, and stator inlets and outlets are determined, and then compressor performance characteristics are predicted. Numerous models have been developed theoretically and experimentally for estimating various types of compressor losses. In present work, performance characteristics of the axial–flow compressor are predicted based on one–dimensional modeling approach. Firstly, the proposed algorithm for modeling and then the losses model for calculation of pressure loss coefficient in the blades cascade have been represented. In this work, models of Lieblein, Koch–Smith, Aungier, Hawell are implemented to consider compressor losses. The model resultes are compared with experimental data to validate the model.<\div>

۲Performance prediction of axial flow gas turbine by using of different models of energy loss and its comparison with experimental results
اطلاعات انتشار: سومین کنفرانس ملی صنعت نیروگاههای حرارتی، سال
تعداد صفحات: ۶
The aim of present research is the performance simulation of axial flow turbine on different operating conditions by using of one dimentional modeling method.In this method by receiving the flow inlet conditions and turbine geometry, velocity triangles at blade inlet and outlet are obtained and performance characteristics of the turbine are calculated. As respects the importance of modeling for performance prediction and optimization in initial desing level, in followingwork, that is based on one dimentional modeling method, after the presentation of solution algorithm by trial and error methodand introduction of different loss models for modeling, the obtained results of modeling were examined for NASA single stage turbine and compared with experimental results. Comparison of the results with experimental data shows great agreement. Also according to these results, Kacker andOkapuu’s developed model gave the closest results to the refrence data.<\div>
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