A Brief Study on Microwave Fast Wave Tubes | Chapter 10 | Innovations in Science and Technology Vol. 5

 Microwave ovens had a crucial role in the twentieth century. This frequency also sees a lot of application development. Microwave tube advancements have aided numerous growths in the recent past. Based on the RF field phase velocity, microwave tubes can be classed as slow-wave or fast-wave devices. A high-power source and amplifier are necessary for millimetre and sub-millimeter wave applications, which can be obtained by designing fast-wave devices. The interaction of the electron with the RF wave in fast wave tubes differs from slow-wave devices, as will be explained further. A brief history is discussed, as well as the many types of fast-wave tubes and their dispersion relationships.

Author(S) Details

Abhijeet Singh
Applied Science & Humanities (Electronics Engineering) Department, Rajkiya Engineering College, Banda-210201, Uttar Pradesh, India.

Madan Singh Chauhan
Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttar Pradesh, India.

Neelam Srivastava
Electronics & Communication Engineering Department, I.E.T., Lucknow, Uttar Pradesh, India.

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Repair & Welding of Elements and Construction Units of Gas Turbine Engines by Means of Electron Beam | Chapter 4 | Advanced Aspects of Engineering Research Vol. 8

 The replacement of gas turbine engines (GTE) is a critical but technically challenging task. The repair of damaged or worn GTE construction units and elements, such as compressor and fan blades, as well as guide cases and hydraulic cylinders of the nozzle block, is a cost-effective alternative to new replacement parts. The results of the development of dependable and effective methods of gas turbine part renewal using electron beam welding are presented in this paper. Repairing three different types of blade airfoil faults, replacing broken guide vanes, and restoring old hydraulic cylinders have all been mastered. It has been confirmed that electron beam welding is an excellent method for repairing aircraft GTE building units.

Author (s) Details

V. M. Nesterenkov
E. O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyr Malevych St., Kyiv, 03150, Ukraine.

Yu V. Orsa
E. O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyr Malevych St., Kyiv, 03150, Ukraine.

K. S. Khripko
E. O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyr Malevych St., Kyiv, 03150, Ukraine.

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