THERMAL ENGINEERING LAB. Load Test on 4-Stroke Single cylinder Diesel Engine Test Rig. 3. THEORY: Single cylinder stationary, constant speed diesel. INSTITUTE OF AERONAUTICAL ENGINEERING. MECHANICAL ENGINEERING DEPARTMENT. THERMAL ENGINEERING LAB. LAB MANUAL. Subject Code. THERMAL ENGINEERING LAB MANUAL - Free download as Word Doc .doc /. docx), PDF File .pdf), Text File .txt) or read online for free.

Thermal Engineering Lab Manual Pdf

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Aurora's Technological and Research Institute. Thermal Lab. Department of Mechanical. 1. THERMAL ENGINEERING. LAB MANUAL. B. Tech III Year - I. B.P Vs Indicated thermal efficiency. 5. Air fuel Ratio Vs B.P. 6. Air fuel Ratio Vs S.F.C. THEORY: The Test Ring consists of Four-Stroke Diesel Engine, to be tested. THERMAL ENGINEERING LAB MANUAL. MRCET. DEPT. OF MECHANICAL ENGINEERING. Page 7 of Experiment No. 1. I.C. ENGINE.

Determination of Viscosity using Red Wood Viscometer. Determination of Flash Point and Fire Point. Conducting performance Test on Steam Turbine. Conducting performance test on reciprocating air compressor Apparatus Required: 1. Four stroke cycle diesel engine Measuring tape Chalk Piece of paper Theory and Description: The diagram which shows the position of crank of four stroke cycle engine at the beginning and at the end of suction, compression, expansion, and exhaust of the engine are called as Valve Timing Diagram.

The fuel is injected into the cylinder when the piston is at TDC and at the end of compression stroke but in actual practise it will differ.

Inlet Valve opening and closing: In an actual engine, the inlet valve begins to open 5C to 20 C before the piston reaches the TDC during the end of exhaust stroke. This is necessary to ensure that the valve will be fully open when the piston reaches the TDC.

If the inlet valve is allowed to close at BDC , the cylinder would receive less amount of air than its capacity and the pressure at the end of suction will be below the atmospheric pressure. To avoid this inlet valve is kept open for 25 to 40after BDC.

Exhaust valve opening and closing Complete clearing of the burned gases from the cylinder is necessary to take in more air into the cylinder. It is clear from the diagram, for certain period both inlet valve and exhaust valve remains in open condition.

The crank angles for which the both Valves are open are called as overlapping period. This overlapping is more than the petrol engine.

This is because better evaporation and mixing fuel. Procedure: 1.

Remove the cylinder head cover and identify the inlet valve, exhaust valve and piston of particular cylinder. Mark the BDC and TDC position of flywheel This is done by Rotating the crank in usual direction of rotation and observe the position of the fly wheel, when the piston is moving downwards at which the piston begins to move in opposite direction.

Make the mark on the flywheel with reference to fixed point on the body of the engine. That point is the BDC for that cylinder.

Measure the circumference. Insert the paper in the tappet clearance of both inlet and exhaust valves 4. Slowly rotate the crank until the paper in the tappet clearance of inlet valve is gripped. This position represent the inlet valve open IVO.


Measure the distance from TDC and tabulate the distance. Rotate the crank further, till the paper is just free to move. Make the marking on the flywheel against the fixed reference.

This position represents the inlet valve close IVC. Measure the distance from BDC and tabulate the distance.


Rotate the crank further, till the paper in the tappet clearance of exhaust valve is gripped. Make the marking on the flywheel against fixed reference. This position represents the exhaust valve open EVO.

Measure the distance from BDC and tabulate. Then convert the measured distances into angle in degrees Result: The valve timing diagram for the given four stroke Diesel engine was drawn.

No: Date: To draw the port timing diagram of given two stroke cycle petrol engine. Two stroke petrol engine 2. Measuring tape 3. Chalk Theory and Description: In the case of two stroke cycle engines the inlet and exhaust valves are not present. Instead, the slots are cut on the cylinder itself at different elevation and they are called ports. There are three ports are present in the two stroke cycle engine. Engine cooling is done by through continuous flowing water. Engine coupled to hydraulic brake 2.

Clutch arrangement 3. Morse test setup 4. Stand, Panel with all measurements 5.


Air tank, fuel tank 6. The shaft is extended at both ends and supported between two bearings.

Rotor is coupled at one end to the engine shaft. Water is allowed inside through stator and flows inside pockets Subscribe to view the full document. Any closure of valve or any restriction of flowing water, created breaking effect on the shaft, and which is reflected in opposition force of stator. Stator while reacting to proportional force pulls a spring balance, which is calibrated in kgs. Controlling all three valves enables to increase or decrease the load on the engine.

It helps to either couple engine to hydraulic brake or decouple both.Rotate the crank further, till the paper in the tappet clearance of exhaust valve is gripped. Suseel Jai Krishnan. Rotate the flywheel slowly in usual direction usually clockwise and observe the movement of the piston 4. Bharath Reddy.


To avoid this inlet valve is kept open for 25 to 40after BDC. This position represent the inlet valve open IVO. To conduct performance test on a two stage reciprocating compressor and to determine the volumetric efficiency Apparatus Required:

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