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3 Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

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Two-Phase Flow Analysis of the Centrifugal Compressor Inlet

100%

Biba Y.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2008

tom nr 134

7-16

Uniformity of flow distribution after centrifugal compressor inlet has a substantial impact on compressor performance. Liquid present in the gas affects performance of downstream stage components. A CFD study of two-phase flow in the compressor inlet is discussed. An inlet design is derived from the family of Dresser-Rand DATUM® compressors and adapted to actual conditions. Analysis of two-phase flow field and losses is presented. Conclusions are made on the applicability of the proposed inlet configuration to selected application and on flexibility of the DATUM product line.

Advancements in centrifugal compressor development for challenging applications

51%

Biba Y. , Koch J. , Maier W.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2014

tom nr 146

45--46

The lecture provides an overview of challenging compressor applications (in terms of common aerodynamic criteria) focusing on two examples, due to their use of advanced analytical tools and test models. Development of DATUM ICS with Rotating Centrifugal Separator (RCS) technology combined rotary gas-liquid separation and centrifugal compressor flow path. Such a combination represents a new class of turbomachinery and leads to increased system compactness by significantly reducing the size and weight of installed equipment and eliminating large separation vessels often used on traditional compressor trains. An overview is given for the Dresser-Rand RCS development, multiphase mean-line and CFD modeling, and Demo tests, including the latest one at high pressure conditions, more challenging for separation. The test allowed better understanding of the aero- and thermodynamic behavior of the RCS and validated both compression and separation performance at demanding operating conditions. Centrifugal compressors in the refrigeration cycles of LNG production process are characterized by large flow coefficient and high machine Mach number. Therefore both compressed medium and high speed operation directly impact performance. An overview is given on a typical CFD analysis of high-Mach number application stage, along with its test validation on D-R development test rig. Discussion on optimization highlights both the mean-line level of design and analysis, when specialized tools are used for preliminary design, and the CFD level, through parametric studies.

Application of supersonic ejectors for hydrocarbon emissions capture

38%

Biba Y. , Kidd H. A. , Peifer S. , Scott C. , Sloof B. , Tse A.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2011

tom nr 140

39-52

Supersonic ejectors capturing low-pressure leakage gas from the compressors gas seal vents and re-injecting it into the fuel gas line of the gas generator allow not only saving the gas that otherwise would be leaking to the atmosphere but also eliminate hydrocarbon emissions. There are also operational and maintenance benefits, as the supersonic ejector itself does not have moving parts and is inherently maintenance free. A prototype design was developed and tested at a pipeline compressor station. A family of three ejectors was designed to cover a range of operating conditions associated with gas turbine driven compressors in pipeline applications. These ejectors were built, installed on the specially designed panel and tested at the Dresser-Rand facility. A comparison of predicted and as-tested operating maps is discussed and conclusions are made about operating range.