scholarly journals “Something Trouble the Matter with the Engine”

2012 ◽  
Vol 134 (01) ◽  
pp. 36-39
Author(s):  
John Laurence Busch

This article describes the design of steamboats during the first generation. The first generation of steamboat mechanics and engineers stuck to what they believed they could manage: low-steam engines with pressure gauges properly installed and monitored; single cylinders and moving parts that were kept continuously lubricated with tallow; boilers that were kept as air-tight as possible; and on the insides of those boilers, a periodic scraping and cleaning of any salt build-up, which became a bigger and bigger problem as steamboats ventured into saltier waters along the East Coast. As this wonderful new technology continued to expand into new territories, its true believers concluded that more powerful engines were needed. In the early 1820s, there was increased experimentation with two-cylinder engines and high-pressure boilers, both of which served to give steam-powered vessels the strength and stamina they needed to push a larger hull over greater distances. With their increasing adoption through the 1820s, multi-cylinder high-pressure steam engines marked the end of the first family of steam vessels, and the beginning of the next generation.

1995 ◽  
Vol 21 (4) ◽  
pp. 591-606 ◽  
Author(s):  
G. Cattadori ◽  
L. Galbiati ◽  
L. Mazzocchi ◽  
P. Vanini

1979 ◽  
Vol 10 (9) ◽  
Author(s):  
H. MIYOSHI ◽  
N. TSUBOUCHI ◽  
A. NISHIMOTO

Author(s):  
Juri Bellucci ◽  
Federica Sazzini ◽  
Filippo Rubechini ◽  
Andrea Arnone ◽  
Lorenzo Arcangeli ◽  
...  

This paper focuses on the use of the CFD for improving a steam turbine preliminary design tool. Three-dimensional RANS analyses were carried out in order to independently investigate the effects of profile, secondary flow and tip clearance losses, on the efficiency of two high-pressure steam turbine stages. The parametric study included geometrical features such as stagger angle, aspect ratio and radius ratio, and was conducted for a wide range of flow coefficients to cover the whole operating envelope. The results are reported in terms of stage performance curves, enthalpy loss coefficients and span-wise distribution of the blade-to-blade exit angles. A detailed discussion of these results is provided in order to highlight the different aerodynamic behavior of the two geometries. Once the analysis was concluded, the tuning of a preliminary steam turbine design tool was carried out, based on a correlative approach. Due to the lack of a large set of experimental data, the information obtained from the post-processing of the CFD computations were applied to update the current correlations, in order to improve the accuracy of the efficiency evaluation for both stages. Finally, the predictions of the tuned preliminary design tool were compared with the results of the CFD computations, in terms of stage efficiency, in a broad range of flow coefficients and in different real machine layouts.


2001 ◽  
Vol 71 (12) ◽  
pp. 1063-1067 ◽  
Author(s):  
Jui-Chin Chen ◽  
Wei-Hua Yao ◽  
Chien-Hsin Chen ◽  
Cheng-Chi Chen

1885 ◽  
Vol 119 (5) ◽  
pp. 396-407
Author(s):  
William Barnet Le Van

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