There is no such thing as thrust specific fuel consumption of a turboshaft engine, as a turboshaft is designed to deliver mechanical power, not thrust. This mechanical power can be converted into electric power by a generator or converted into thrust by a propeller or rotor. Basically, a turboshaft uses jet technology but is an alternative to a piston engine.

While thrust specific fuel consumption doesn't exist for a turboshaft, "brake specific fuel consumption" does. It measures the rate of flow of fuel required for a certain amount of power. For example, a specific fuel consumption of 0.2 lbs/h/hp means that for every horsepower the turboshaft produces, it burns 0.2 lbs of fuel each hour.

at first we have to know what is specific fuel consumption. From definition we know that- "The amount of fuel required per unit production".

consumption of fuel in grams per horse power(kw) one hour

Specific fuel consumption is an exact measure of how many pounds (or other measure of weight or volume) is used to produce each horsepower an engine produces. For example, if you have a diesel engine running at a certain speed that produces 10 HP while burning 4.5 lbs of fuel per hour, its specific fuel consumption is .45 lbs/HP.

The average fuel consumption of the 2006 Honda Accord is 10 km per liter of fuel. This includes in calculation the fuel consumption in crowded areas and the fuel consumption in regular areas.