A Large Design Space Multidisciplinary Optimization of a Mixed Flow Micro Gas Turbine Compressor Stage

Numerical study on the compressor stage of a KJ-66 micro gas turbine was conducted in this paper through both steady and unsteady Reynolds-averaged Navier–Stokes. The study was conducted for the numerical prediction of micro gas turbine compressor performance at various operation conditions, with special attention given to the transient flow behaviors during compressor operation. The numerical results showed reasonable agreements with experimental data while providing predictions for the charting of compressor performance map at various operation speeds. The simulation results indicated that the increase of operation speed from 80 k r/min to 117 k r/min would leads to an increased peak total pressure ratio from 1.54 to 1.96, while decreasing the peak adiabatic efficiency from 0.73 to 0.55. This paper also provided discussion on details of transient flow field within the compressor stage as well as demonstrated the smooth flow transition through rotor–stator interactions.

Download Full-text

Influence of Non-Equilibrium Fluid Properties During Fogging on Intake Duct and Compressor Characteristics

Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration Applications; Organic Rankine Cycle Power Systems ◽

10.1115/gt2017-63267 ◽

2017 ◽

Cited By ~ 1

Author(s):

Christoph Günther ◽

Franz Joos

Keyword(s):

Relative Humidity ◽

Gas Turbine ◽

Thermophysical Properties ◽

Ambient Air ◽

Compressor Stage ◽

Compression Process ◽

Fluid Properties ◽

Temperature And Pressure ◽

Gas Turbine Compressor ◽

Non Equilibrium

This study reports on numerically calculated thermophysical properties of air passing through a gas turbine compressor after passage through an intake duct affected by wet compression. Case of reference is unaffected ambient air (referenced to as dry scenario) passing through intake duct and compressor. Furthermore, ambient air cooled down by (overspray) fogging (referenced to as wet scenarios) was considered. Acceleration at the end of intake duct causing reduction of static temperature and pressure results in supersaturated fluid properties at inlet to gas turbine compressor. These supersaturated fluid properties are non-equilibrium with saturation level above relative humidity of φ = 1. Entrance of supersaturated fluid into gas turbine compressor can result in condensation within first compressor stage. At the same time delayed impact of evaporative cooling influences compression process.

Download Full-text

Fitting and simulation of characteristic curve of micro gas turbine compressor

10.1109/ciced50259.2021.9556667 ◽

2021 ◽

Author(s):

Yingkun Liu ◽

Fei Chen ◽

Min Cao ◽

Siyang Liu

Keyword(s):

Gas Turbine ◽

Characteristic Curve ◽

Micro Gas Turbine ◽

Gas Turbine Compressor

Download Full-text

Modeling and Analysis of Micro Gas Turbine Compressor Different Parts

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.36.24540 ◽

2018 ◽

Vol 7 (4.36) ◽

pp. 822

Author(s):

Sinoj . ◽

M. Dev Anand ◽

N. Ramasamy

Keyword(s):

Gas Turbine ◽

Small Scale ◽

Modeling And Analysis ◽

Micro Gas Turbine ◽

Fast Prototyping ◽

Gas Turbine Compressor ◽

Different Parts

The work displayed in the report is an endeavor at planning a miniaturized scale turbine of a given measurement. Broad writing audit was done to contemplate the different perspectives and utilizations of small scale turbines. An appropriate outline methodology was looked over the accessible strategies to plan distinctive parts of miniaturized scale turbine. CATIA is utilized broadly to make parts with diff sorts of tasks. At that point every one of the parts are collected for making a total turbine in CATIA Get together area. At that point they are sending for fast prototyping.

Download Full-text

Evaporation effect of water droplets in a uniform duct flow under micro gas turbine compressor environments

The Proceedings of the National Symposium on Power and Energy Systems ◽

10.1299/jsmepes.2017.22.b133 ◽

2017 ◽

Vol 2017.22 (0) ◽

pp. B133

Author(s):

Shota UEDA ◽

Toshiaki TSUCHIYA

Keyword(s):

Gas Turbine ◽

Duct Flow ◽

Water Droplets ◽

Micro Gas Turbine ◽

Effect Of Water ◽

Gas Turbine Compressor

Download Full-text

A Large Design Space Multidisciplinary Optimization of a Mixed Flow Micro Gas Turbine Compressor Stage

Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines ◽

10.1115/gt2020-14259 ◽

2020 ◽

Author(s):

Thomas Ochabski ◽

Johan van der Spuy ◽

Thomas Hildebrandt

Keyword(s):

Pearson Correlation ◽

Pressure Ratio ◽

Pressure Rise ◽

Multidisciplinary Optimization ◽

Simultaneous Optimization ◽

Compressor Stage ◽

Mixed Flow ◽

Flow Angle ◽

Baseline Design ◽

Design Point

Abstract A parametrization method for the simultaneous optimization of the impeller and diffuser of a mixed flow compressor stage across a wide geometrical diversity is presented. The optimization focused on determining the optimal mixed flow (meridional) angle for a predefined set of constraints. The number of parameters required to achieve the large geometric diversity associated with a variable mixed flow angle was greatly reduced by coupling the endwall and camber Bézier control points with user-defined functions. The influence of geometric features on design performance was assessed using a Pearson correlation coefficient map. It was observed that stage total-to-static pressure ratio, and efficiency, were strongly influenced by diffuser outlet passage height and diffuser vane wrap angle. This was due to these parameters’ control of flow separation magnitude at the diffuser hub in the radial-to-axial bend. The method improved design point efficiency by 4.24 percentage points (to 86.24%) and increased the operating range by 6.7% at the cost of a decreased design point pressure rise, when compared to the baseline design.

Download Full-text