7. Describe the difference(s), if any, between pre-mixed and diffusion type combustion. Please select all answers that apply: a) In pre-mixed type combustion, the fuel and oxidizer are mixed before entering the combustion chamber. b) In diffusion type combustion the fuel and oxidizer enter the combustion chamber from two separate inlet streams. c) In pre-mixed combustion the fuel and oxidizer enter the combustion chamber through a single stream. d) In diffusion combustion, the fuel is injected through a nozzle. e) In diffusion combustion, the oxidizer swirls around the fuel nozzle.

7. Describe the difference(s), if any, between pre-mixed and diffusion type combustion. Please select all answers that apply: a) In pre-mixed type combustion, the fuel and oxidizer are mixed before entering the combustion chamber. b) In diffusion type combustion the fuel and oxidizer enter the combustion chamber from two separate inlet streams. c) In pre-mixed combustion the fuel and oxidizer enter the combustion chamber through a single stream. d) In diffusion combustion, the fuel is injected through a nozzle. e) In diffusion combustion, the oxidizer swirls around the fuel nozzle.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter32: Oil Heat

Section: Chapter Questions

Problem 12RQ: When incomplete combustion occurs, what additional by-products of combustion are created?

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7. Describe the difference(s), if any, between pre-mixed and diffusion type combustion.
Please select all answers that apply:
a) In pre-mixed type combustion, the fuel and oxidizer are mixed before entering the combustion chamber.
b) In diffusion type combustion the fuel and oxidizer enter the combustion chamber from two separate inlet streams.
c) In pre-mixed combustion the fuel and oxidizer enter the combustion chamber through a single stream.
d) In diffusion combustion, the fuel is injected through a nozzle.
e) In diffusion combustion, the oxidizer swirls around the fuel nozzle.

8. Describe the relevance(s), if any, for using the mixture fraction ratio in combustion.
Please select all answers that apply:
a) The mixture fraction identifies the type of combustion.
b) The mixture fraction is the same for either complete and incomplete combustion.
c) There are two different mixing fractions: lean and rich combustion.
d) The mixing fractions concepts can only be applied for diffusion type combustion.
e) The mixing fractions concepts can only be applied to both pre-mixer and diffusion type combustion.

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