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Grant support

This research has received funding from he Ministerio de Ciencia, Innovation e Universidades of Spain under the project SIMOPAIR (Ref: RTI2018-480 097075-B-I00). This work has received funding from the European Union's Horizon 2020 research and innovation programme under the project FLOWCID, grant agreement No 101019137.

Analysis of institutional authors

Carbajosa, CAuthorMartinez-Cava, ACorresponding AuthorValero, EAuthor

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July 25, 2022
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Efficiency of Pulsating Base Bleeding to Control Trailing Edge Flow Configurations

Publicated to:Applied Sciences-Basel. 12 (13): 6760- - 2022-07-01 12(13), DOI: 10.3390/app12136760

Authors: Carbajosa, Carlos; Martinez-Cava, Alejandro; Valero, Eusebio; Paniagua, Guillermo

Affiliations

Purdue Univ, Maurice J Zucrow Labs, 500 Allison Rd, W Lafayette, IN 47907 USA - Author
Univ Politecn Madrid IDR UPM, Inst Univ Microgravedad Ignacio da Riva, E-28223 Madrid, Spain - Author
Univ Politecn Madrid, Ctr Computat Simulat, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain - Author

Abstract

As high-pressure-turbines operate at extreme temperature conditions, base bleed can be applied at the trailing edge of the airfoils, enhancing the thermal protection along the trailing edge surface, but also disrupting the trailing edge flow and altering the overall aerodynamic pressure losses. The current work explores the potential use of base bleed as a flow control tool to modulate the flow between turbine blade rows. Through the numerical analysis of a symmetric airfoil immersed in a subsonic flow, the effects that trailing edge ejection has on the base region properties and the downstream flow are evaluated. In particular, previous research constrained to steady blowing is now extended to consider an unsteady pulsating base bleed injection. Three injection frequencies are investigated, covering a wide range of base bleed intensities. The results presented herein demonstrate that pulsating bleed flow is more efficient than its steady counterpart in terms of reducing pressure losses and controlling the primary frequency of the downstream oscillations for the same mass flow injection.

Keywords

AerodynamicsComputational fluid dynamicsCoolant ejectionFlow controlModelPressureTrailing edge flowUnsteady flow characteristics

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Applied Sciences-Basel due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2022, it was in position 42/90, thus managing to position itself as a Q2 (Segundo Cuartil), in the category Engineering, Multidisciplinary. Notably, the journal is positioned en el Cuartil Q2 para la agencia Scopus (SJR) en la categoría Engineering (Miscellaneous).

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-07-08:

  • Google Scholar: 2
  • WoS: 3
  • Scopus: 3

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-08:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 4 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

    It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

    • The work has been submitted to a journal whose editorial policy allows open Open Access publication.

    Leadership analysis of institutional authors

    This work has been carried out with international collaboration, specifically with researchers from: United States of America.

    There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (CARBAJOSA FERNANDEZ, CARLOS) .

    the author responsible for correspondence tasks has been MARTINEZ-CAVA AGUILAR, ALEJANDRO.