國立臺灣大學應用力學研究所胡文聰2006-07-262018-06-292006-07-262018-06-291999-07-31http://ntur.lib.ntu.edu.tw//handle/246246/21552本計劃針對台大應用力學研究所之大 型、低速軸流壓縮机設備進行流場旋轉失 速之實驗探討。實驗目的為針對此複雜流 場進行初步之瞭解，特別在穩定流初步進 入旋轉失速時之特徵現象。實驗中裝置熱 線在轉子葉片前約一弦長處(為避免轉子葉 片勢流場之干擾)，量測在轉子/定子壓縮段 中接近失速前之流場特性。結果明確顯示 進入失速前之流場為非定常，並有一段前 波(precursor wave)出現。前波之物理特性證 實為旋轉失速現象之前身，亦前波直接發 展至失速流場。熱線量測結果顯示旋轉失 速之頻率為93%軸轉速，可知在本壓縮機中 轉子失速現象為單失速區。asurement of rotating stall in the largescale, low-speed axial compressor facility. The purpose of the study was to make initial attempt to characterize the overall phenomenon of rotating stall by measurement of hot-wire signature upstream of the rotor row. Measurement was taken at stall-onset flow coefficient with rotor/stator blade configuration. Data show clear characteristic of time-mean steady flow entering into rotating stall flow. The precursor region shows a clear growth of the instability and finally developing into a full-scale rotating stall phenomenon. The frequency of the stall cell is shown to be 0.93 that of the shaft frequency, which means that one stall cell per rev characterize this axial compressor. Moreover the signature of the hot-wire suggests that the spatial extent of the stall cell is fairly small.application/pdf610438 bytesapplication/pdfzh-TW國立臺灣大學應用力學研究所軸流壓縮機勢流效應rotating stallaxial compressorhotwire measurementreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/21552/1/882212E002054.pdf