Skip to main content
SpringerLink
Log in

Noise characteristics of centrifugal blower with low solidity cascade diffuser (Noise reduction by means of small groove located at LSD blade leading tip)

  • Published:
Journal of Thermal Science Aims and scope Submit manuscript

Abstract

This paper deals with the effect of the blade tip-groove of the low solidity cascade diffuser (LSD) on the blower characteristic and the noise generated by the LSD. The small grooves were set up at the root and/or tip near the leading edge of the LSD blade. In order to clarify the mechanism of noise increase due to LSD and also to reduce the noise, the relationships between the noise increase based on the LSD, the LSD performance and the secondary flow formed additionally by the tip-groove were investigated experimentally as well as numerically, especially analyzing flow behaviors in the LSD in view points of flow separation on the suction surface of the LSD blade and the secondary flow on the side walls. By reducing the stagnation region smaller near the root and/or tip of the LSD blade leading edge, the secondary flow behavior changes remarkably around the LSD blade, as a result, the noise level and the blower characteristics vary. It can be concluded that, by means of a small tip-groove located only at the shroud side near the LSD blade leading edge, the noise generated by the LSD can be reduced without deteriorations of the LSD performance and the blower characteristics as well.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Senoo, Y. et al.: Low Solidity Tandem-Cascade Diffuser for Wide-Flow-Range Centrifugal Blowers, ASME Paper NO.83-GT-3, pp.1–7 (1983)

  2. Hayami, H. et al.: Effect of Inlet Passage Width Contraction of Low-Solidity Cascade Diffuser on Performance of Transonic Centrifugal Compressor, JSME NO.95-1128, pp.461–465 (1996)

  3. Sakaguchi, D. et al.: Analysis of Noise Generated by Low Solidity Cascade Diffuser in a Centrifugal Blower, ASME Paper No. GT2008-50750, pp.1–9 (2008)

Download references

Author information

Authors and Affiliations

  1. Graduate School of Science and Technology, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan

    Tengen Murakami, Masahiro Ishida, Daisaku Sakaguchi & Yu Koba

Authors
  1. Tengen Murakami
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Masahiro Ishida
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Daisaku Sakaguchi
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Yu Koba
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Murakami, T., Ishida, M., Sakaguchi, D. et al. Noise characteristics of centrifugal blower with low solidity cascade diffuser (Noise reduction by means of small groove located at LSD blade leading tip). J. Therm. Sci. 18, 321–324 (2009). https://doi.org/10.1007/s11630-009-0321-0

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11630-009-0321-0

Keywords

Search

Navigation