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Title: Design, dynamic modeling, and control of a multistage CO 2 compression system

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1414867
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
International Journal of Greenhouse Gas Control
Additional Journal Information:
Journal Volume: 62; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-12-26 11:57:44; Journal ID: ISSN 1750-5836
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Modekurti, Srinivasarao, Eslick, John, Omell, Benjamin, Bhattacharyya, Debangsu, Miller, David C., and Zitney, Stephen E. Design, dynamic modeling, and control of a multistage CO 2 compression system. Netherlands: N. p., 2017. Web. doi:10.1016/j.ijggc.2017.03.009.
Modekurti, Srinivasarao, Eslick, John, Omell, Benjamin, Bhattacharyya, Debangsu, Miller, David C., & Zitney, Stephen E. Design, dynamic modeling, and control of a multistage CO 2 compression system. Netherlands. doi:10.1016/j.ijggc.2017.03.009.
Modekurti, Srinivasarao, Eslick, John, Omell, Benjamin, Bhattacharyya, Debangsu, Miller, David C., and Zitney, Stephen E. 2017. "Design, dynamic modeling, and control of a multistage CO 2 compression system". Netherlands. doi:10.1016/j.ijggc.2017.03.009.
@article{osti_1414867,
title = {Design, dynamic modeling, and control of a multistage CO 2 compression system},
author = {Modekurti, Srinivasarao and Eslick, John and Omell, Benjamin and Bhattacharyya, Debangsu and Miller, David C. and Zitney, Stephen E.},
abstractNote = {},
doi = {10.1016/j.ijggc.2017.03.009},
journal = {International Journal of Greenhouse Gas Control},
number = C,
volume = 62,
place = {Netherlands},
year = 2017,
month = 7
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 26, 2018
Publisher's Accepted Manuscript

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  • Using a two-dimensional compressible flow representation of axial compressor dynamics, a control-theoretic input-output model is derived, which is of general utility in rotating stall/surge active control studies. The derivation presented here begins with a review of the fluid dynamic model, which is a two-dimensional stage stacking technique that accounts for blade row pressure rise, loss, and deviation as well as blade row and interblade row compressible flow. This model is extended to include the effects of the upstream and downstream geometry and boundary conditions, and then manipulated into a transfer function form that dynamically relates actuator motion to sensor measurements.more » Key relationships in this input-output form are then approximated using rational polynomials. Further manipulation yields an approximate model in standard form for studying active control of rotating stall and surge. As an example of high current relevance, the transfer function from an array of jet actuators to an array of static pressure sensors is derived. Numerical examples are also presented, including a demonstration of the importance of proper choice of sensor and actuator locations, as well as a comparison between sensor types. Under a variety of conditions, it was found that sensor locations near the front of the compressor or in the downstream gap are consistently the best choices, based on a quadratic optimization criterion and a specific three-stage compressor model. The modeling and evaluation procedures presented here are a first step toward a rigorous approach to the design of active control systems for high-speed axial compressors.« less
  • An existing throughflow method for axial compressors, which accounts for the effects of spanwise mixing using a turbulent diffusion model, has been extended to include the viscous shear force on the endwall. The use of a shear force, consistent with a no-slip condition, on the annulus walls in the throughflow calculations allows realistic predictions of the velocity and flow angle profiles near the endwalls. The annulus wall boundary layers are therefore incorporated directly into the throughflow prediction. This eliminates the need for empirical blockage factors or independent annulus boundary layer calculations. The axisymmetric prediction can be further refined by specifyingmore » realistic spanwise variations of loss coefficient and deviation to model the three-dimensional endwall effects. The resulting throughflow calculation gives realistic predictions of flow properties across the whole span of a compressor. This is confirmed by comparison with measured data from both low and high-speed multistage machines. The viscous throughflow method has been incorporated into an axial compressor design system. The method predicts the meridional velocity defects in the endwall region and consequently blading can be designed that allows for the increased incidence, and low dynamic head, near the annulus walls.« less
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