"Is this...... Let me think. ”

Chang Haonan did not answer Lin Qing's question immediately.

On the premise of fully mastering the design of the core engine of the aviation engine, it is not difficult to change a gas turbine for power generation.

Industrial gas turbines have almost no requirements for volume and weight, and natural gas in this era is very cheap, and most of the users are also large producers of natural gas in oil fields, and the high point of fuel consumption is high, so the performance trade-off is mainly power, which is very close to the orientation of aero engines.

So, while the change from jet fuel to natural gas may seem like a big change, there are not many changes that need to be made in practice, i.e. those required to convert from fuel fluids to gas.

But power gas turbines are different.

On the one hand, its performance is based on thermal efficiency, after all, the fuel that can be carried on the ship is limited, and the higher the thermal efficiency, the longer the endurance can be maintained, and the operating conditions need to be optimized first.

On the other hand, the marine fuel is mainly light diesel, which is much less fluid than jet fuel, but more troublesome than natural gas.

In addition, Chang Haonan will soon participate in the improvement of the J-7F and the No. 10 project, and most of the specific design work is estimated to be completed by the 606 Institute alone.

In short, it is difficult to come up with the efficiency that was optimized for turbojet 14.

After careful consideration, Chang Haonan finally spoke again:

"There are two main ideas for the conversion of twin-rotor turbojet engines, mainly different from the air intake mechanism."

"One is to remove the exhaust nozzle, use the dual-rotor structure as the gas generator of the gas turbine, and then install a matching power turbine; The second is to remove the entire low-pressure component, redesign the new low-pressure compressor and low-pressure turbine, and use the new low-pressure turbine to drive the new low-pressure compressor and directly drive the load, which can save a power turbine. ”

"If you want to catch up with a certain time node and are very urgent need for a design plan or prototype, I think the 606 Institute can first use the first idea to make an early model for you to carry out overall technical verification."

"This time should be very fast, about half a year, no more than a year at most, but it will definitely be worse in terms of fuel economy. Upgrade and improve with the second idea in the future, anyway, your frigate hasn't even started the overall design yet, and the progress will definitely catch up, how? ”

Lin Qing, who heard the news, couldn't believe that this was true:

"One year...... Can it really be done in a year? ”

Judging from his slightly trembling tone, this question was obviously not questioning Chang Haonan's ability.

The latter smiled and nodded:

"The foundation of the turbojet 14 engine is very good, especially since the more advanced annular combustion chamber is used at the beginning instead of the simpler ring tube combustion chamber, and the fuel atomization is through the pneumatic atomization of the fuel nozzle and the two-stage cyclone cup with venturi and sleeve structure, which can be used with the strong shear effect generated by the venturi pre-film and the double swirl, and the atomization, evaporation and blending processes are stronger."

"So if you can relax the requirements for fuel economy, then the overall amount of change will not be very large, plus it is the foundation of a medium-sized engine, the design is very compact, and it does not need to spend too much effort to reduce the volume of the gas engine, the workload is not very large, and one year is enough."

"That's great, that's great......"

Lin Qing, who was overjoyed, hurriedly picked up the cup and took a sip of wine, barely allowing himself to lose his temper because he was too excited:

"As long as the power of the gas turbine is in place, the rest are small problems, and they are all small problems......

"Oh yes, Comrade Xiao Chang, I only talked about the design part before, and what about the production, does the production process need to import foreign parts or raw materials?"

Chang Haonan spent a few seconds recalling what he saw when he visited the 410 factory before.

"If I have to say, some imported equipment is needed in the manufacturing and testing process, but the parts and components, including the materials, are produced by ourselves, so although we are not sure what the final allocation price is, the cost can definitely be controlled, and valuable foreign exchange can be saved."

He knew very well what Lin Qing meant by this question just now, so he specially emphasized the last two sentences.

In 1996, the country's foreign exchange reserves were only $110 billion, not long after the end of the trade deficit stage.

Produced in the whole country, it means low cost.

It doesn't matter if the local currency value of the transfer price is more expensive at the exchange rate than the import.

Whether you want to admit it or not, in this era, the RMB and the US dollar and the British pound are indeed not in the same position at all.

Sure enough, after hearing this answer, Lin Qing directly put down the wine glass and held Chang Haonan's hand with both hands:

"Comrade Xiao Chang, you are simply our savior!"

Just as every aircraft design institute wants its products to be used as the main equipment of the Air Force, the Naval Research Institute wants its ships to become the leading models of the Navy.

Of course, in this field, 701 is the only one, and there is almost no external competition.

But as a model master, dreams are always there.

Who doesn't want to see the ships of their own design spread across the three major fleets, flying the flag of the People's Navy and galloping across the ocean?

To achieve this, the first condition is that the number of buildings should not be too small.

Like 052, the model that built two ships and ended hastily can only be regarded as a star ship, and there is no way to become the backbone.

And the number of constructions is obviously closely related to the cost.

Under the same conditions, the cost of gas turbine is definitely higher than that of diesel engine, whether it is built or used.

However, many key components of the Piertic diesel engine still need to be imported from France, and if the gas turbine can be fully localized, the situation will be different.

The local currency, a little more expensive, a little more expensive.

However, the import quota in the army's equipment funds is limited.

If you use it here, you have to cut it out a little bit there.

The money saved on imported diesel engine parts can be exchanged for a few anti-submarine helicopters, or regional anti-aircraft missiles, supersonic anti-ship missiles, and other things that the navy urgently needs.

"It's okay."

Chang Haonan couldn't bear this sudden enthusiasm, and silently withdrew his hand:

"Although I am not a person from the ship system, whether it is the air force or navy, it is our people's army, and I am very happy to be able to help my brother units."

Lin Qing's face changed slightly, and then he solemnly thanked him.

In fact, for a long time, there has been a situation of segmentation between military industrial units of different systems.

Especially from the mid-70s to the early 90s, it took about 15 years, because there were inevitably some frictions in the process of "fending for themselves", and the exclusion of each other was quite serious.

If it had been put aside ten years ago, Shipbuilding Industry would not have come to help the aviation industry co-organize the air show.

By the mid-90s, things had improved a lot, but like a family that had just finished a fight, a lack of communication was inevitable.

Otherwise, Lin Qing would not have known anything about the situation of Turbojet 14.

If the cooperation between the 701 Institute and the 606 Institute can be reached, it may become an opportunity to break the ice.

"However, Master Lin, I hope you can promise me and the 606 Institute one thing."

Just as the two were about to end the conversation, Chang Haonan remembered some things he had seen in the internal materials before:

"There must not be another thing that happened with the Type 055 destroyer."

(End of chapter)