Experimental study on the thermal-hydraulic performance of a tube-in-tube helical coil air–fuel heat exchanger for an aero-engine

Penghua Liu, Renting Wang, Shaobei Liu and Zewei Bao

Energy, 2023, vol. 267, issue C

Abstract: To fulfill the need for thermal protection in advanced aero-engines, a tube-in-tube helical coil (TTHC) air–fuel heat exchanger is recommended for a cooled cooling air system. This paper presents the testing of a TTHC heat exchanger. The results show that the heat exchanger effectively cooled the hot air because the compressed air temperature decreased from 823 K to 519 K with a flow rate of 0.0056 kg/s. The heat exchanger exhibited a maximum power–weight ratio of 26.6 kW/kg. The heat transfer rate was primarily determined by the air side heat transfer performance with a relatively high fuel flow rate. The density and viscosity of the fluid changed with the fluid temperature, resulting in a change in the pressure drop. Therefore, the pressure drops on the inner and annulus sides are related to the flow rate and heat transfer process. Large deviations were observed between the experimental data and calculated values by correlations reported in the literature, which were attributed to the differences in the experimental operating conditions and geometric parameters. A new empirical coefficient correlation for the annulus side was obtained using the Wilson plot method, which will be beneficial for researchers in designing similar air–fuel heat exchangers.

Keywords: Air–fuel heat exchanger; Tube-in-tube helical coil heat exchanger; Heat transfer; Flow resistance; Cooled cooling air (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223000208
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:267:y:2023:i:c:s0360544223000208

DOI: 10.1016/j.energy.2023.126626

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().