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ASME 1983 International Gas Turbine Conference and Exhibit | 1983

Low-Solidity Tandem-Cascade Diffusers for Wide-Flow-Range Centrifugal Blowers

Yasutoshi Senoo; Hiroshi Hayami; Hironobu Ueki

The pressure recovery of a low-solidity circular cascade diffuser of a centrifugal blower was predicted by a simple method combining a theory of circular cascade diffusers and that of vaneless diffusers and it was compared with a series of experiments. Furthermore the stall limit of the diffuser was studied. In order to improve the performance further, a series of tandem-cascade diffusers were tested. In these diffusers, the front row of the cascade was designed for a small flow rate while the rear row of the cascade was designed for a large flow rate so that the tandem cascade would accomplish good pressure recovery in a wide range of flow rate. Experimental results showed that the operating range was as wide as that of a vaneless diffuser and the pressure recovery was excellent at a small flow rate while it was somewhat better than that in a vaneless diffuser at a large flow rate.Copyright


Transactions of the JSME (in Japanese) | 2017

Study of unsteady structure inside near-nozzle diesel spray by L2F

Kento Mori; Keisuke Komada; Hironobu Ueki


Transactions of the JSME (in Japanese) | 2016

Breakup characteristics of diesel spray droplets under small valve opening injection

Noritsune Kawaharada; Daisaku Sakaguchi; Hironobu Ueki; Masahiro Ishida


The Proceedings of Mechanical Engineering Congress, Japan | 2016

Correlation between Turbulence Intensity and Spray Width near Nozzle Hole of Diesel Fuel Injector

Yamato Naruse; Manabu Saito; Keisuke Komada; Daisaku Sakaguchi; Hironobu Ueki


The Proceedings of Mechanical Engineering Congress, Japan | 2015

G0700505 Influence of injection pressure on diesel spray characteristics

Keita Suzuki; Hironobu Ueki; Noritsune Kawaharada; Daisaku Sakaguchi


The Proceedings of Mechanical Engineering Congress, Japan | 2015

G0700504 Effect of nozzle hole diameter on diesel spray characteristics

Yuki Morimoto; Hironobu Ueki; Noritsune Kawaharada; Daisaku Sakaguchi


The Proceedings of Conference of Kyushu Branch | 2014

112 Effect of Catalyst Coating Method on Soot Oxidation Performance in Diesel Particulate Filters

Shotaro Oshima; Ryosuke Fujiwara; Shohei Yamamoto; Hironobu Ueki; Masahiro Ishida


The Proceedings of Conference of Kyushu Branch | 2014

110 Numerical Analysis of Diesel Fuel Spray Based on Micro-Probe L2F Measurement

Takayuki Taniguchi; Noritsune Kawaharada; Keisuke Komada; Shohei Yamamoto; Daisaku Sakaguchi; Hironobu Ueki


The Proceedings of Conference of Kyushu Branch | 2014

111 Effect of Exhaust Gas Recirculation on Exhaust Emission of Bio-alcohol Combustion in a Diesel Engine

Ryo Kaida; Shotaro Watanabe; Shohei Yamamoto; Daisaku Sakaguchi; Hironobu Ueki; Masahiro Ishida


The Proceedings of Conference of Kyushu Branch | 2014

4C1 Effect of Injection Pressure on Velocity and Size of Droplets in Diesel Fuel Sprays

Tatsuya Zaitsu; Noritsune Kawaharada; Daisaku Sakaguchi; Hironobu Ueki

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