The Gas Turbine; Theory, Construction, and Records of the Results Obtained from Two Actual Machines (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...with the internal method of regulation, combined with a throttle governor. Both methods, however, comply with the conditions previously laid down for the regulation of a gas turbine: the pressure or heat drop is in both cases very near the most favourable value. A less suitable method is that in which the intervals between the individual admissions are regulated, and also the actual times of admission, combined as before with gas-throttling regulation. Governing purely by throttling of the gas is simple but inefficient.-The blowing plant must also be regulated with the gas turbine. Since the energy for driving this plant is obtained from the exhaust heat, it is advantageous that the blowing plant be governed by maintaining the steam pressure constant in the regenerator. If, for instance, the gas turbine is working with a big load, more driving energy will be given to the blowing plant; the speed of revolution of the blower rises, and with it the compression pressure or exhauster pressure, and vice versa. 16. SUMMARY. INFLUENCE OF THE INDIVIDUAL FACTORS ON THE PROCESS. The foregoing theory of the gas turbine does not serve as a guide for the calculations of the turbine, but explains the influence of the various factors on the gas turbine process. In this theory, after a short description of the cycle, the individual phases of the process are analytically examined, such as ignition, combustion, and expansion. It is shown that the general treatment, without any consideration of the heat given to the walls, leads to entirely erroneous results; the theory further shows that this factor is of fundamental importance to the gas turbine, and that it varies according as the gas turbine cycle is a mechanical or heat cycle. The employment of the...