SHORT QUESTION ANSWERS-STEAM TURBINE-1 1. What is a steam turbine? Steam turbine is a high speed rotating machine which converts the heat energy of steam into work energy (motion energy or electrical energy). 2. Why is steam turbine most widely used? Steam turbines are widely used to develop power as their efficiency is highest as […]

 SSTATES OF MATTER AND PHASE CHANGE PROCESSES  Differentiate between the three states of matter Solids  Liquids Gases Have fixed volume and fixed shape Have fixed volume But have variable shape Variable volume And variable shape What are the various types of phase changes? Five types of phase changes Phase change    Name of Process Practical Application […]

A Thermodynamic Cycle consists of thermodynamic processes in series and such that system returns to its initial starting point. (a)    POWER CYCLES (HEAT ENGINE CYCLES) WITH EXTERNAL COMBUSTION Cycle Process 1—2(compression) Process 2—3(heat addition) Process 3—4(Expansion) Process 4—1(Heat rejection) Remarks CARNOT CYCLE ISENTROPIC ISOTHERMAL ISENTROPIC ISOTHERMAL IDEAL HEAT ENGINE CYCLE BELL COLEMAN CYCLE ADIABATIC ISOBARIC […]

NON FLOW AND FLOW WORK NON FLOW WORK (i)                 Work input to a compressor during compression process ( from the start of compression to end of compression) (ii)               Work obtained from a turbine during expansion only (During start of expansion to the end of expansion) Mathematical form of non-flow work = area under the curve= […]

BOUNDARY LAYER SEPARATION When fluid flows past a body (cylinder or an airplane), fluid is accelerated due to pressure drop and ∂p/∂x is negative (pressure decreases as x increases). When ∂p/∂x becomes zero, velocity decreases and separation of flow occurs and back flow is just to start. At the point of separation, the following are […]

ISEN-TROPIC AND ADIABATIC PROCESSES ISEN-TROPIC PROCESS Heat exchange is zero. dq=0, Tds=0 s = entropy =  constant There is no internal friction or ir-reversibility There is no heat interaction between the system and the surroundings dq =0 It is just a theoretical process which cannot be achieved in actual practical application and hence no examples […]

TTHERMODYNAMIC PROCESSES AND PROPERTIES  Any thermodynamic system works on a closed repeatable cycle. Each cycle consists of four processes (very rarely two processes).In these processes there is transfer of heat and work into the system or out of the system. Normally processes are used having one variable as constant. For example, such as ISOTHERMAL (T=constant), […]

STEADY FLOW ENERGY EQUATION Steady flow means there is no change with respect to time.  There is no change in the properties with respect to time.Steady flow is constant rate of flow of fluid throughout the control volume. The control volume of a thermodynamic system is  fixed area in space through which mass will enter the […]