Project Pulse Jet Engine ppt

Design and fabrication of  prototype pulse jet engine

Joel kevin saldanha  Vikram mallya Niyanth yadav  Hencil mendonca

What is Project Pulse–Jet? ▫ Project Pulse – Jet 

is an analytical study of how a pulse-jet engine works.

▫ Our Goals 

To design, build pulse-jet engine.

▫ Plan of Action 

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Research and design a prototype of a pulse-jet engine. Build the prototype based on our design.

History of the pulsejet • The pulsejet engine was first invented in the early 1900 by a Swedish inventor Martin Wiberg • Paul Schmidt, who engineered the first production pulsejet during the Second  World War with his flying bomb, the Argus V1. ▫ Nicknamed the “buzz” bomb because of the low hum it admitted during flight. ▫ Used by the Germans to bomb London from 1944-1945 ▫ Over 9,000 V-1 were fired on England during WW2

• The pulsejet took a backseat in the engineering world when the turbofan jet engine was invented • Has returned to the engineering scene as of late because of the interest in Pulse Detonation Engines (PDE).

How does it work? •  A pulsejet engine is a very simple jet engine consisting of very little to no moving parts. The combustion cycle comprises five or six phases: Induction, Compression, (in some engines) Fuel Injection, Ignition, Combustion, and Exhaust.

• The rapidly expanding gasses exit out of the engine and as this happens a vacuum is created in the combustion chamber which pulls in a fresh new air charge fro m the atmosphere, and then the  whole cycle repeats itself.

Combustion Cycle

Types of Pulse Jets • There are two basic types of pulsejets. ▫  valve or traditional pulsejet ▫  valve-less pulsejet.

Design Research • The Lenoir cycle is an idealized thermodynamic cycle often used to model a pulse-jet engine. • Comprises of 3 cycles: ▫ Heat added at constant volume. ▫  Adiabatic Expansion. ▫ Exhaust of the hot gasses at a constant pressure. • Thrust can be directly calibrated on the  basis that the cycle is completed over two working strokes.

Design Research • C.E. Tharratt ▫ Discovered a surprising result that the ratio of duct  volume to effective length had a linear relationship to the maximum static thrust or: 

 V/L = 0.00316F

▫ This relationship has been compared to all known pulse-jets from the large V-1 “flying bomb” of over 500 lb. thrust to the miniature Dyna-jets of 4-5 lbs. thrust. 

Thrust = 2.2 x Cross-Sectional area or F = 2.2A 

Valveless Pulse-Jet plan design

Material used

Fuel and Fuel delivery • Fuel ▫ LPG Easily obtained. Boiling Point below room temperature. Being a gas allows for easier starting. • Fuel Delivery System ▫ LPG TANK ▫ Gas Fitting Nozzle ▫ Needle Valve 

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Building and Testing • Materials ▫ Pulse-Jets Main body. 

Rolled and seem welded using 0.063” MILD Steel Sheet Metal.

Testing • Prototype will be tested to verify thrust output. • Test Stand will be constructed to secure PulseJet safely.

Budget • MILD steel sheet metal, with labor: Rs 5400 • • • • • •

Lpg Tank: Rs o, on hand Fuel Delivery System: on hand Test stand material: Rs 2000 Fuel: Rs 600 Total: Rs 8000

Project’s Future • Continue testing on prototype to gain further knowledge of its operating cycle. • Construct larger Jet using the knowledge gained from this smaller prototype. • Use larger engine to power to propel a manned vehicle.

Bibliography • Simpson Bruce “The Enthusiasts' Guide to Pulsejet Engines” • http://www.aardvark.co.nz/pjet/ • http://www.zachmiers.com/pulsejetbo ok/ • http://www.pulse-jets.com/ • Roy, Gabriel “Combustion processes in propulsion control, noise, and pulse detonation”

Questions?