Glass-Ceramic Hexagonal and Circular Passage Surfaces - Heat Transfer and Flow Friction Design Characteristics 730100

Heat transfer and flow friction design characteristics are presented for some “second-generation” glass-ceramic heat exchanger surfaces. These surfaces are of interest in their application as the matrix for the rotary regenerator of the vehicular gas turbine engine.
The paper gives the results for four test matrices, with 550-1650 ft2/ft3 area densities. Two matrices had hexagonal cross-sectional passages and two had circular passages. Test results, derived by the single-blow transient technique, are compared with predictions from laminar flow conduction theory. Flow Reynolds numbers are in the range 80 < Re < 1000.
These surfaces have some advantages over the currently employed triangular passage geometry. The significance of these advantages in terms of the regenerator thermal performance and envelope geometry is discussed.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.

Due to current capacity constraints, printed versions of our publications - including standards, technical papers, EDGE Reports, scholarly journal articles, books, and paint chips - may experience shipping delays of up to two weeks. We apologize for any inconvenience.